Home / 91,813,612.20-137,720,418.30-79,856,189.70

Finding the Fourth Proportional to 91,813,612.20, 137,720,418.30 and 79,856,189.70

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Solution

The fourth proportional to 91,813,612.20, 137,720,418.30 and 79,856,189.70 is: 119,784,284.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,813,612.20 : 137,720,418.30 = 79,856,189.70 : x
  2. Step 2: Convert to fraction form
    91,813,612.20/137,720,418.30 = 79,856,189.70/x
  3. Step 3: Cross multiply
    91,813,612.20x = 137,720,418.30 × 79,856,189.70
  4. Step 4: Simplify right side
    91,813,612.20x = 10,997,827,849,328,152
  5. Step 5: Solve for x
    x = 10,997,827,849,328,152/91,813,612.20
  6. Step 6: Final answer
    x = 119,784,284.55

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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.