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Finding the Fourth Proportional to 103,708.13, 142,815.80 and 90,089.91

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Solution

The fourth proportional to 103,708.13, 142,815.80 and 90,089.91 is: 124,062.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,708.13 : 142,815.80 = 90,089.91 : x
  2. Step 2: Convert to fraction form
    103,708.13/142,815.80 = 90,089.91/x
  3. Step 3: Cross multiply
    103,708.13x = 142,815.80 × 90,089.91
  4. Step 4: Simplify right side
    103,708.13x = 12,866,262,793.80
  5. Step 5: Solve for x
    x = 12,866,262,793.80/103,708.13
  6. Step 6: Final answer
    x = 124,062.24

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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.