Home / 78,770.53-118,155.19-19,605.80

Finding the Fourth Proportional to 78,770.53, 118,155.19 and 19,605.80

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Solution

The fourth proportional to 78,770.53, 118,155.19 and 19,605.80 is: 29,408.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,770.53 : 118,155.19 = 19,605.80 : x
  2. Step 2: Convert to fraction form
    78,770.53/118,155.19 = 19,605.80/x
  3. Step 3: Cross multiply
    78,770.53x = 118,155.19 × 19,605.80
  4. Step 4: Simplify right side
    78,770.53x = 2,316,527,024.10
  5. Step 5: Solve for x
    x = 2,316,527,024.10/78,770.53
  6. Step 6: Final answer
    x = 29,408.55

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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.