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Finding the Fourth Proportional to 125,006.86, 172,509.92 and 67,646.18

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Solution

The fourth proportional to 125,006.86, 172,509.92 and 67,646.18 is: 93,351.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,006.86 : 172,509.92 = 67,646.18 : x
  2. Step 2: Convert to fraction form
    125,006.86/172,509.92 = 67,646.18/x
  3. Step 3: Cross multiply
    125,006.86x = 172,509.92 × 67,646.18
  4. Step 4: Simplify right side
    125,006.86x = 11,669,637,100.11
  5. Step 5: Solve for x
    x = 11,669,637,100.11/125,006.86
  6. Step 6: Final answer
    x = 93,351.97

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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.