Home / 78,756.16-118,134.67-19,591.83

Finding the Fourth Proportional to 78,756.16, 118,134.67 and 19,591.83

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Solution

The fourth proportional to 78,756.16, 118,134.67 and 19,591.83 is: 29,387.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,756.16 : 118,134.67 = 19,591.83 : x
  2. Step 2: Convert to fraction form
    78,756.16/118,134.67 = 19,591.83/x
  3. Step 3: Cross multiply
    78,756.16x = 118,134.67 × 19,591.83
  4. Step 4: Simplify right side
    78,756.16x = 2,314,474,371.75
  5. Step 5: Solve for x
    x = 2,314,474,371.75/78,756.16
  6. Step 6: Final answer
    x = 29,387.85

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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.