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Finding the Fourth Proportional to 124,960, 172,465.28 and 71,998.72

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Solution

The fourth proportional to 124,960, 172,465.28 and 71,998.72 is: 99,370.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,960 : 172,465.28 = 71,998.72 : x
  2. Step 2: Convert to fraction form
    124,960/172,465.28 = 71,998.72/x
  3. Step 3: Cross multiply
    124,960x = 172,465.28 × 71,998.72
  4. Step 4: Simplify right side
    124,960x = 12,417,279,404.44
  5. Step 5: Solve for x
    x = 12,417,279,404.44/124,960
  6. Step 6: Final answer
    x = 99,370.03

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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.