Home / 56,470.50-77,929.29-31,320

Finding the Fourth Proportional to 56,470.50, 77,929.29 and 31,320

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Solution

The fourth proportional to 56,470.50, 77,929.29 and 31,320 is: 43,221.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,470.50 : 77,929.29 = 31,320 : x
  2. Step 2: Convert to fraction form
    56,470.50/77,929.29 = 31,320/x
  3. Step 3: Cross multiply
    56,470.50x = 77,929.29 × 31,320
  4. Step 4: Simplify right side
    56,470.50x = 2,440,745,362.80
  5. Step 5: Solve for x
    x = 2,440,745,362.80/56,470.50
  6. Step 6: Final answer
    x = 43,221.60

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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.