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Finding the Fourth Proportional to 125,140.59, 172,555.65 and 79,746.71

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Solution

The fourth proportional to 125,140.59, 172,555.65 and 79,746.71 is: 109,962.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,140.59 : 172,555.65 = 79,746.71 : x
  2. Step 2: Convert to fraction form
    125,140.59/172,555.65 = 79,746.71/x
  3. Step 3: Cross multiply
    125,140.59x = 172,555.65 × 79,746.71
  4. Step 4: Simplify right side
    125,140.59x = 13,760,744,516.63
  5. Step 5: Solve for x
    x = 13,760,744,516.63/125,140.59
  6. Step 6: Final answer
    x = 109,962.28

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1.5x scale

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.