Home / 56,630.80-78,143.70-31,132.96

Finding the Fourth Proportional to 56,630.80, 78,143.70 and 31,132.96

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Solution

The fourth proportional to 56,630.80, 78,143.70 and 31,132.96 is: 42,959.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,630.80 : 78,143.70 = 31,132.96 : x
  2. Step 2: Convert to fraction form
    56,630.80/78,143.70 = 31,132.96/x
  3. Step 3: Cross multiply
    56,630.80x = 78,143.70 × 31,132.96
  4. Step 4: Simplify right side
    56,630.80x = 2,432,844,686.35
  5. Step 5: Solve for x
    x = 2,432,844,686.35/56,630.80
  6. Step 6: Final answer
    x = 42,959.74

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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.