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Finding the Fourth Proportional to 125,178.99, 172,747.18 and 74,216.69

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Solution

The fourth proportional to 125,178.99, 172,747.18 and 74,216.69 is: 102,419.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,178.99 : 172,747.18 = 74,216.69 : x
  2. Step 2: Convert to fraction form
    125,178.99/172,747.18 = 74,216.69/x
  3. Step 3: Cross multiply
    125,178.99x = 172,747.18 × 74,216.69
  4. Step 4: Simplify right side
    125,178.99x = 12,820,723,783.27
  5. Step 5: Solve for x
    x = 12,820,723,783.27/125,178.99
  6. Step 6: Final answer
    x = 102,419.14

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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.