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Finding the Fourth Proportional to 91,479.80, 137,219.70 and 52,113.80

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Solution

The fourth proportional to 91,479.80, 137,219.70 and 52,113.80 is: 78,170.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,479.80 : 137,219.70 = 52,113.80 : x
  2. Step 2: Convert to fraction form
    91,479.80/137,219.70 = 52,113.80/x
  3. Step 3: Cross multiply
    91,479.80x = 137,219.70 × 52,113.80
  4. Step 4: Simplify right side
    91,479.80x = 7,151,040,001.86
  5. Step 5: Solve for x
    x = 7,151,040,001.86/91,479.80
  6. Step 6: Final answer
    x = 78,170.70

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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.