Home / 78,660.10-108,550.41-42,850.13

Finding the Fourth Proportional to 78,660.10, 108,550.41 and 42,850.13

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Solution

The fourth proportional to 78,660.10, 108,550.41 and 42,850.13 is: 59,132.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,660.10 : 108,550.41 = 42,850.13 : x
  2. Step 2: Convert to fraction form
    78,660.10/108,550.41 = 42,850.13/x
  3. Step 3: Cross multiply
    78,660.10x = 108,550.41 × 42,850.13
  4. Step 4: Simplify right side
    78,660.10x = 4,651,399,237.18
  5. Step 5: Solve for x
    x = 4,651,399,237.18/78,660.10
  6. Step 6: Final answer
    x = 59,132.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.