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Finding the Fourth Proportional to 125,931.80, 188,832.90 and 47,005.40

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Solution

The fourth proportional to 125,931.80, 188,832.90 and 47,005.40 is: 70,483.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,931.80 : 188,832.90 = 47,005.40 : x
  2. Step 2: Convert to fraction form
    125,931.80/188,832.90 = 47,005.40/x
  3. Step 3: Cross multiply
    125,931.80x = 188,832.90 × 47,005.40
  4. Step 4: Simplify right side
    125,931.80x = 8,876,165,997.66
  5. Step 5: Solve for x
    x = 8,876,165,997.66/125,931.80
  6. Step 6: Final answer
    x = 70,483.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.