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Finding the Fourth Proportional to 66,003.60, 99,005.40 and 55,117.20

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Solution

The fourth proportional to 66,003.60, 99,005.40 and 55,117.20 is: 82,675.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,003.60 : 99,005.40 = 55,117.20 : x
  2. Step 2: Convert to fraction form
    66,003.60/99,005.40 = 55,117.20/x
  3. Step 3: Cross multiply
    66,003.60x = 99,005.40 × 55,117.20
  4. Step 4: Simplify right side
    66,003.60x = 5,456,900,432.88
  5. Step 5: Solve for x
    x = 5,456,900,432.88/66,003.60
  6. Step 6: Final answer
    x = 82,675.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.