Home / 107,708.72-161,312.28-103,971.92

Finding the Fourth Proportional to 107,708.72, 161,312.28 and 103,971.92

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Solution

The fourth proportional to 107,708.72, 161,312.28 and 103,971.92 is: 155,715.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,708.72 : 161,312.28 = 103,971.92 : x
  2. Step 2: Convert to fraction form
    107,708.72/161,312.28 = 103,971.92/x
  3. Step 3: Cross multiply
    107,708.72x = 161,312.28 × 103,971.92
  4. Step 4: Simplify right side
    107,708.72x = 16,771,947,471.18
  5. Step 5: Solve for x
    x = 16,771,947,471.18/107,708.72
  6. Step 6: Final answer
    x = 155,715.78

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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.