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Finding the Fourth Proportional to 125,123.15, 172,654.16 and 99,693.95

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Solution

The fourth proportional to 125,123.15, 172,654.16 and 99,693.95 is: 137,565.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,123.15 : 172,654.16 = 99,693.95 : x
  2. Step 2: Convert to fraction form
    125,123.15/172,654.16 = 99,693.95/x
  3. Step 3: Cross multiply
    125,123.15x = 172,654.16 × 99,693.95
  4. Step 4: Simplify right side
    125,123.15x = 17,212,574,580.30
  5. Step 5: Solve for x
    x = 17,212,574,580.30/125,123.15
  6. Step 6: Final answer
    x = 137,565.07

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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.