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Finding the Fourth Proportional to 124,898.76, 172,353.96 and 77,156.28

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Solution

The fourth proportional to 124,898.76, 172,353.96 and 77,156.28 is: 106,471.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,898.76 : 172,353.96 = 77,156.28 : x
  2. Step 2: Convert to fraction form
    124,898.76/172,353.96 = 77,156.28/x
  3. Step 3: Cross multiply
    124,898.76x = 172,353.96 × 77,156.28
  4. Step 4: Simplify right side
    124,898.76x = 13,298,190,396.87
  5. Step 5: Solve for x
    x = 13,298,190,396.87/124,898.76
  6. Step 6: Final answer
    x = 106,471.76

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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.