Home / 56,807.79-78,391.17-31,312.75

Finding the Fourth Proportional to 56,807.79, 78,391.17 and 31,312.75

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Solution

The fourth proportional to 56,807.79, 78,391.17 and 31,312.75 is: 43,209.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,807.79 : 78,391.17 = 31,312.75 : x
  2. Step 2: Convert to fraction form
    56,807.79/78,391.17 = 31,312.75/x
  3. Step 3: Cross multiply
    56,807.79x = 78,391.17 × 31,312.75
  4. Step 4: Simplify right side
    56,807.79x = 2,454,642,912.44
  5. Step 5: Solve for x
    x = 2,454,642,912.44/56,807.79
  6. Step 6: Final answer
    x = 43,209.62

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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.