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Finding the Fourth Proportional to 124,987.60, 172,482.24 and 68,399.92

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Solution

The fourth proportional to 124,987.60, 172,482.24 and 68,399.92 is: 94,391.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,987.60 : 172,482.24 = 68,399.92 : x
  2. Step 2: Convert to fraction form
    124,987.60/172,482.24 = 68,399.92/x
  3. Step 3: Cross multiply
    124,987.60x = 172,482.24 × 68,399.92
  4. Step 4: Simplify right side
    124,987.60x = 11,797,771,417.42
  5. Step 5: Solve for x
    x = 11,797,771,417.42/124,987.60
  6. Step 6: Final answer
    x = 94,391.53

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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.