Home / 78,001.70-117,002.55-38,550.65

Finding the Fourth Proportional to 78,001.70, 117,002.55 and 38,550.65

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Solution

The fourth proportional to 78,001.70, 117,002.55 and 38,550.65 is: 57,825.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,001.70 : 117,002.55 = 38,550.65 : x
  2. Step 2: Convert to fraction form
    78,001.70/117,002.55 = 38,550.65/x
  3. Step 3: Cross multiply
    78,001.70x = 117,002.55 × 38,550.65
  4. Step 4: Simplify right side
    78,001.70x = 4,510,524,354.16
  5. Step 5: Solve for x
    x = 4,510,524,354.16/78,001.70
  6. Step 6: Final answer
    x = 57,825.98

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1.5x scale

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.