Home / 103,621.10-155,470.05-99,781.10

Finding the Fourth Proportional to 103,621.10, 155,470.05 and 99,781.10

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Solution

The fourth proportional to 103,621.10, 155,470.05 and 99,781.10 is: 149,708.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,621.10 : 155,470.05 = 99,781.10 : x
  2. Step 2: Convert to fraction form
    103,621.10/155,470.05 = 99,781.10/x
  3. Step 3: Cross multiply
    103,621.10x = 155,470.05 × 99,781.10
  4. Step 4: Simplify right side
    103,621.10x = 15,512,972,606.06
  5. Step 5: Solve for x
    x = 15,512,972,606.06/103,621.10
  6. Step 6: Final answer
    x = 149,708.63

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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.