Home / 145,778.28-201,105.30-85,311.90

Finding the Fourth Proportional to 145,778.28, 201,105.30 and 85,311.90

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Solution

The fourth proportional to 145,778.28, 201,105.30 and 85,311.90 is: 117,690.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,778.28 : 201,105.30 = 85,311.90 : x
  2. Step 2: Convert to fraction form
    145,778.28/201,105.30 = 85,311.90/x
  3. Step 3: Cross multiply
    145,778.28x = 201,105.30 × 85,311.90
  4. Step 4: Simplify right side
    145,778.28x = 17,156,675,243.07
  5. Step 5: Solve for x
    x = 17,156,675,243.07/145,778.28
  6. Step 6: Final answer
    x = 117,690.20

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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.