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Finding the Fourth Proportional to 85,149.78, 117,508.80 and 47,424.66

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Solution

The fourth proportional to 85,149.78, 117,508.80 and 47,424.66 is: 65,447.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,149.78 : 117,508.80 = 47,424.66 : x
  2. Step 2: Convert to fraction form
    85,149.78/117,508.80 = 47,424.66/x
  3. Step 3: Cross multiply
    85,149.78x = 117,508.80 × 47,424.66
  4. Step 4: Simplify right side
    85,149.78x = 5,572,814,887.01
  5. Step 5: Solve for x
    x = 5,572,814,887.01/85,149.78
  6. Step 6: Final answer
    x = 65,447.20

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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.