Home / 56,635.60-78,159.13-31,143.90

Finding the Fourth Proportional to 56,635.60, 78,159.13 and 31,143.90

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Solution

The fourth proportional to 56,635.60, 78,159.13 and 31,143.90 is: 42,979.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,635.60 : 78,159.13 = 31,143.90 : x
  2. Step 2: Convert to fraction form
    56,635.60/78,159.13 = 31,143.90/x
  3. Step 3: Cross multiply
    56,635.60x = 78,159.13 × 31,143.90
  4. Step 4: Simplify right side
    56,635.60x = 2,434,180,128.81
  5. Step 5: Solve for x
    x = 2,434,180,128.81/56,635.60
  6. Step 6: Final answer
    x = 42,979.68

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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.