Home / 103,945.80-155,688.30-80,496.20

Finding the Fourth Proportional to 103,945.80, 155,688.30 and 80,496.20

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Solution

The fourth proportional to 103,945.80, 155,688.30 and 80,496.20 is: 120,565.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,945.80 : 155,688.30 = 80,496.20 : x
  2. Step 2: Convert to fraction form
    103,945.80/155,688.30 = 80,496.20/x
  3. Step 3: Cross multiply
    103,945.80x = 155,688.30 × 80,496.20
  4. Step 4: Simplify right side
    103,945.80x = 12,532,316,534.46
  5. Step 5: Solve for x
    x = 12,532,316,534.46/103,945.80
  6. Step 6: Final answer
    x = 120,565.88

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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.