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Finding the Fourth Proportional to 66,710.14, 100,065.20 and 31,630.66

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Solution

The fourth proportional to 66,710.14, 100,065.20 and 31,630.66 is: 47,445.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,710.14 : 100,065.20 = 31,630.66 : x
  2. Step 2: Convert to fraction form
    66,710.14/100,065.20 = 31,630.66/x
  3. Step 3: Cross multiply
    66,710.14x = 100,065.20 × 31,630.66
  4. Step 4: Simplify right side
    66,710.14x = 3,165,128,319.03
  5. Step 5: Solve for x
    x = 3,165,128,319.03/66,710.14
  6. Step 6: Final answer
    x = 47,445.99

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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.