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Finding the Fourth Proportional to 125,026.80, 172,490.52 and 79,694.40

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Solution

The fourth proportional to 125,026.80, 172,490.52 and 79,694.40 is: 109,948.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,026.80 : 172,490.52 = 79,694.40 : x
  2. Step 2: Convert to fraction form
    125,026.80/172,490.52 = 79,694.40/x
  3. Step 3: Cross multiply
    125,026.80x = 172,490.52 × 79,694.40
  4. Step 4: Simplify right side
    125,026.80x = 13,746,528,497.09
  5. Step 5: Solve for x
    x = 13,746,528,497.09/125,026.80
  6. Step 6: Final answer
    x = 109,948.65

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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.