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Finding the Fourth Proportional to 125,731.79, 173,509.92 and 69,143.15

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Solution

The fourth proportional to 125,731.79, 173,509.92 and 69,143.15 is: 95,417.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,731.79 : 173,509.92 = 69,143.15 : x
  2. Step 2: Convert to fraction form
    125,731.79/173,509.92 = 69,143.15/x
  3. Step 3: Cross multiply
    125,731.79x = 173,509.92 × 69,143.15
  4. Step 4: Simplify right side
    125,731.79x = 11,997,022,425.05
  5. Step 5: Solve for x
    x = 11,997,022,425.05/125,731.79
  6. Step 6: Final answer
    x = 95,417.57

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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.