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Finding the Fourth Proportional to 103,613.12, 142,984.68 and 58,287.68

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Solution

The fourth proportional to 103,613.12, 142,984.68 and 58,287.68 is: 80,436.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,613.12 : 142,984.68 = 58,287.68 : x
  2. Step 2: Convert to fraction form
    103,613.12/142,984.68 = 58,287.68/x
  3. Step 3: Cross multiply
    103,613.12x = 142,984.68 × 58,287.68
  4. Step 4: Simplify right side
    103,613.12x = 8,334,245,272.74
  5. Step 5: Solve for x
    x = 8,334,245,272.74/103,613.12
  6. Step 6: Final answer
    x = 80,436.20

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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.