Home / 78,468.28-117,702.36-31,721.16

Finding the Fourth Proportional to 78,468.28, 117,702.36 and 31,721.16

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Solution

The fourth proportional to 78,468.28, 117,702.36 and 31,721.16 is: 47,581.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,468.28 : 117,702.36 = 31,721.16 : x
  2. Step 2: Convert to fraction form
    78,468.28/117,702.36 = 31,721.16/x
  3. Step 3: Cross multiply
    78,468.28x = 117,702.36 × 31,721.16
  4. Step 4: Simplify right side
    78,468.28x = 3,733,655,393.94
  5. Step 5: Solve for x
    x = 3,733,655,393.94/78,468.28
  6. Step 6: Final answer
    x = 47,581.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.