Home / 78,161.50-117,247.65-38,708.02

Finding the Fourth Proportional to 78,161.50, 117,247.65 and 38,708.02

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Solution

The fourth proportional to 78,161.50, 117,247.65 and 38,708.02 is: 58,064.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,161.50 : 117,247.65 = 38,708.02 : x
  2. Step 2: Convert to fraction form
    78,161.50/117,247.65 = 38,708.02/x
  3. Step 3: Cross multiply
    78,161.50x = 117,247.65 × 38,708.02
  4. Step 4: Simplify right side
    78,161.50x = 4,538,424,381.15
  5. Step 5: Solve for x
    x = 4,538,424,381.15/78,161.50
  6. Step 6: Final answer
    x = 58,064.70

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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.