Home / 103,437.75-155,063.02-71,862.60

Finding the Fourth Proportional to 103,437.75, 155,063.02 and 71,862.60

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Solution

The fourth proportional to 103,437.75, 155,063.02 and 71,862.60 is: 107,728.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,437.75 : 155,063.02 = 71,862.60 : x
  2. Step 2: Convert to fraction form
    103,437.75/155,063.02 = 71,862.60/x
  3. Step 3: Cross multiply
    103,437.75x = 155,063.02 × 71,862.60
  4. Step 4: Simplify right side
    103,437.75x = 11,143,231,781.05
  5. Step 5: Solve for x
    x = 11,143,231,781.05/103,437.75
  6. Step 6: Final answer
    x = 107,728.87

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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.