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Finding the Fourth Proportional to 124,742, 172,147.84 and 68,157.12

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Solution

The fourth proportional to 124,742, 172,147.84 and 68,157.12 is: 94,058.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,742 : 172,147.84 = 68,157.12 : x
  2. Step 2: Convert to fraction form
    124,742/172,147.84 = 68,157.12/x
  3. Step 3: Cross multiply
    124,742x = 172,147.84 × 68,157.12
  4. Step 4: Simplify right side
    124,742x = 11,733,100,988.62
  5. Step 5: Solve for x
    x = 11,733,100,988.62/124,742
  6. Step 6: Final answer
    x = 94,058.95

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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.