Home / 56,807.92-78,395.48-31,315.20

Finding the Fourth Proportional to 56,807.92, 78,395.48 and 31,315.20

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Solution

The fourth proportional to 56,807.92, 78,395.48 and 31,315.20 is: 43,215.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,807.92 : 78,395.48 = 31,315.20 : x
  2. Step 2: Convert to fraction form
    56,807.92/78,395.48 = 31,315.20/x
  3. Step 3: Cross multiply
    56,807.92x = 78,395.48 × 31,315.20
  4. Step 4: Simplify right side
    56,807.92x = 2,454,970,135.30
  5. Step 5: Solve for x
    x = 2,454,970,135.30/56,807.92
  6. Step 6: Final answer
    x = 43,215.28

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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.