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Finding the Fourth Proportional to 145,390.68, 200,641.50 and 79,982.28

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Solution

The fourth proportional to 145,390.68, 200,641.50 and 79,982.28 is: 110,376.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,390.68 : 200,641.50 = 79,982.28 : x
  2. Step 2: Convert to fraction form
    145,390.68/200,641.50 = 79,982.28/x
  3. Step 3: Cross multiply
    145,390.68x = 200,641.50 × 79,982.28
  4. Step 4: Simplify right side
    145,390.68x = 16,047,764,632.62
  5. Step 5: Solve for x
    x = 16,047,764,632.62/145,390.68
  6. Step 6: Final answer
    x = 110,376.85

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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.