Home / 115,875.10-173,812.65-90,991.90

Finding the Fourth Proportional to 115,875.10, 173,812.65 and 90,991.90

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Solution

The fourth proportional to 115,875.10, 173,812.65 and 90,991.90 is: 136,487.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,875.10 : 173,812.65 = 90,991.90 : x
  2. Step 2: Convert to fraction form
    115,875.10/173,812.65 = 90,991.90/x
  3. Step 3: Cross multiply
    115,875.10x = 173,812.65 × 90,991.90
  4. Step 4: Simplify right side
    115,875.10x = 15,815,543,267.54
  5. Step 5: Solve for x
    x = 15,815,543,267.54/115,875.10
  6. Step 6: Final answer
    x = 136,487.85

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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.