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Finding the Fourth Proportional to 125,253.16, 172,867.82 and 79,316.99

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Solution

The fourth proportional to 125,253.16, 172,867.82 and 79,316.99 is: 109,469.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,253.16 : 172,867.82 = 79,316.99 : x
  2. Step 2: Convert to fraction form
    125,253.16/172,867.82 = 79,316.99/x
  3. Step 3: Cross multiply
    125,253.16x = 172,867.82 × 79,316.99
  4. Step 4: Simplify right side
    125,253.16x = 13,711,355,780.72
  5. Step 5: Solve for x
    x = 13,711,355,780.72/125,253.16
  6. Step 6: Final answer
    x = 109,469.14

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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.