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Finding the Fourth Proportional to 56,707.90, 85,061.85 and 47,959.90

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Solution

The fourth proportional to 56,707.90, 85,061.85 and 47,959.90 is: 71,939.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,707.90 : 85,061.85 = 47,959.90 : x
  2. Step 2: Convert to fraction form
    56,707.90/85,061.85 = 47,959.90/x
  3. Step 3: Cross multiply
    56,707.90x = 85,061.85 × 47,959.90
  4. Step 4: Simplify right side
    56,707.90x = 4,079,557,819.82
  5. Step 5: Solve for x
    x = 4,079,557,819.82/56,707.90
  6. Step 6: Final answer
    x = 71,939.85

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1.5x scale

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.