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Finding the Fourth Proportional to 66,560.90, 91,802.10 and 42,689.39

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Solution

The fourth proportional to 66,560.90, 91,802.10 and 42,689.39 is: 58,878.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,560.90 : 91,802.10 = 42,689.39 : x
  2. Step 2: Convert to fraction form
    66,560.90/91,802.10 = 42,689.39/x
  3. Step 3: Cross multiply
    66,560.90x = 91,802.10 × 42,689.39
  4. Step 4: Simplify right side
    66,560.90x = 3,918,975,190.71
  5. Step 5: Solve for x
    x = 3,918,975,190.71/66,560.90
  6. Step 6: Final answer
    x = 58,878.04

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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.