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Finding the Fourth Proportional to 125,103.71, 172,655.45 and 71,396.81

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Solution

The fourth proportional to 125,103.71, 172,655.45 and 71,396.81 is: 98,534.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,103.71 : 172,655.45 = 71,396.81 : x
  2. Step 2: Convert to fraction form
    125,103.71/172,655.45 = 71,396.81/x
  3. Step 3: Cross multiply
    125,103.71x = 172,655.45 × 71,396.81
  4. Step 4: Simplify right side
    125,103.71x = 12,327,048,002.13
  5. Step 5: Solve for x
    x = 12,327,048,002.13/125,103.71
  6. Step 6: Final answer
    x = 98,534.63

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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.