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Finding the Fourth Proportional to 105,459.90, 145,512.16 and 62,452.91

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Solution

The fourth proportional to 105,459.90, 145,512.16 and 62,452.91 is: 86,171.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,459.90 : 145,512.16 = 62,452.91 : x
  2. Step 2: Convert to fraction form
    105,459.90/145,512.16 = 62,452.91/x
  3. Step 3: Cross multiply
    105,459.90x = 145,512.16 × 62,452.91
  4. Step 4: Simplify right side
    105,459.90x = 9,087,656,948.69
  5. Step 5: Solve for x
    x = 9,087,656,948.69/105,459.90
  6. Step 6: Final answer
    x = 86,171.68

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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.