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Finding the Fourth Proportional to 145,158.86, 200,331.86 and 80,640.65

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Solution

The fourth proportional to 145,158.86, 200,331.86 and 80,640.65 is: 111,291.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,158.86 : 200,331.86 = 80,640.65 : x
  2. Step 2: Convert to fraction form
    145,158.86/200,331.86 = 80,640.65/x
  3. Step 3: Cross multiply
    145,158.86x = 200,331.86 × 80,640.65
  4. Step 4: Simplify right side
    145,158.86x = 16,154,891,406.11
  5. Step 5: Solve for x
    x = 16,154,891,406.11/145,158.86
  6. Step 6: Final answer
    x = 111,291.12

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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.