Home / 78,337.20-117,582.60-38,938.80

Finding the Fourth Proportional to 78,337.20, 117,582.60 and 38,938.80

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Solution

The fourth proportional to 78,337.20, 117,582.60 and 38,938.80 is: 58,446.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,337.20 : 117,582.60 = 38,938.80 : x
  2. Step 2: Convert to fraction form
    78,337.20/117,582.60 = 38,938.80/x
  3. Step 3: Cross multiply
    78,337.20x = 117,582.60 × 38,938.80
  4. Step 4: Simplify right side
    78,337.20x = 4,578,525,344.88
  5. Step 5: Solve for x
    x = 4,578,525,344.88/78,337.20
  6. Step 6: Final answer
    x = 58,446.37

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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.