Home / 78,387.16-117,432.54-60,770.68

Finding the Fourth Proportional to 78,387.16, 117,432.54 and 60,770.68

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Solution

The fourth proportional to 78,387.16, 117,432.54 and 60,770.68 is: 91,041.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,387.16 : 117,432.54 = 60,770.68 : x
  2. Step 2: Convert to fraction form
    78,387.16/117,432.54 = 60,770.68/x
  3. Step 3: Cross multiply
    78,387.16x = 117,432.54 × 60,770.68
  4. Step 4: Simplify right side
    78,387.16x = 7,136,455,309.93
  5. Step 5: Solve for x
    x = 7,136,455,309.93/78,387.16
  6. Step 6: Final answer
    x = 91,041.13

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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.