Home / 78,229.64-117,356.70-28,304.48

Finding the Fourth Proportional to 78,229.64, 117,356.70 and 28,304.48

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Solution

The fourth proportional to 78,229.64, 117,356.70 and 28,304.48 is: 42,461.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,229.64 : 117,356.70 = 28,304.48 : x
  2. Step 2: Convert to fraction form
    78,229.64/117,356.70 = 28,304.48/x
  3. Step 3: Cross multiply
    78,229.64x = 117,356.70 × 28,304.48
  4. Step 4: Simplify right side
    78,229.64x = 3,321,720,368.02
  5. Step 5: Solve for x
    x = 3,321,720,368.02/78,229.64
  6. Step 6: Final answer
    x = 42,461.15

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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.