Home / 56,831.52-78,428.10-31,338.80

Finding the Fourth Proportional to 56,831.52, 78,428.10 and 31,338.80

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Solution

The fourth proportional to 56,831.52, 78,428.10 and 31,338.80 is: 43,247.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,831.52 : 78,428.10 = 31,338.80 : x
  2. Step 2: Convert to fraction form
    56,831.52/78,428.10 = 31,338.80/x
  3. Step 3: Cross multiply
    56,831.52x = 78,428.10 × 31,338.80
  4. Step 4: Simplify right side
    56,831.52x = 2,457,842,383.48
  5. Step 5: Solve for x
    x = 2,457,842,383.48/56,831.52
  6. Step 6: Final answer
    x = 43,247.87

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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.