Home / 56,742.72-78,302.12-31,251.29

Finding the Fourth Proportional to 56,742.72, 78,302.12 and 31,251.29

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Solution

The fourth proportional to 56,742.72, 78,302.12 and 31,251.29 is: 43,125.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,742.72 : 78,302.12 = 31,251.29 : x
  2. Step 2: Convert to fraction form
    56,742.72/78,302.12 = 31,251.29/x
  3. Step 3: Cross multiply
    56,742.72x = 78,302.12 × 31,251.29
  4. Step 4: Simplify right side
    56,742.72x = 2,447,041,711.97
  5. Step 5: Solve for x
    x = 2,447,041,711.97/56,742.72
  6. Step 6: Final answer
    x = 43,125.21

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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.