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Finding the Fourth Proportional to 124,781.70, 172,198.77 and 71,071.72

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Solution

The fourth proportional to 124,781.70, 172,198.77 and 71,071.72 is: 98,078.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,781.70 : 172,198.77 = 71,071.72 : x
  2. Step 2: Convert to fraction form
    124,781.70/172,198.77 = 71,071.72/x
  3. Step 3: Cross multiply
    124,781.70x = 172,198.77 × 71,071.72
  4. Step 4: Simplify right side
    124,781.70x = 12,238,461,549.43
  5. Step 5: Solve for x
    x = 12,238,461,549.43/124,781.70
  6. Step 6: Final answer
    x = 98,078.98

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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.