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Finding the Fourth Proportional to 125,833.70, 173,654.58 and 72,128.88

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Solution

The fourth proportional to 125,833.70, 173,654.58 and 72,128.88 is: 99,540.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,833.70 : 173,654.58 = 72,128.88 : x
  2. Step 2: Convert to fraction form
    125,833.70/173,654.58 = 72,128.88/x
  3. Step 3: Cross multiply
    125,833.70x = 173,654.58 × 72,128.88
  4. Step 4: Simplify right side
    125,833.70x = 12,525,510,632.75
  5. Step 5: Solve for x
    x = 12,525,510,632.75/125,833.70
  6. Step 6: Final answer
    x = 99,540.19

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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.