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Finding the Fourth Proportional to 66,658.76, 91,994.80 and 37,987.20

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Solution

The fourth proportional to 66,658.76, 91,994.80 and 37,987.20 is: 52,425.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,658.76 : 91,994.80 = 37,987.20 : x
  2. Step 2: Convert to fraction form
    66,658.76/91,994.80 = 37,987.20/x
  3. Step 3: Cross multiply
    66,658.76x = 91,994.80 × 37,987.20
  4. Step 4: Simplify right side
    66,658.76x = 3,494,624,866.56
  5. Step 5: Solve for x
    x = 3,494,624,866.56/66,658.76
  6. Step 6: Final answer
    x = 52,425.59

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.