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Finding the Fourth Proportional to 155,439, 233,232.30 and 66,717.90

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Solution

The fourth proportional to 155,439, 233,232.30 and 66,717.90 is: 100,108.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,439 : 233,232.30 = 66,717.90 : x
  2. Step 2: Convert to fraction form
    155,439/233,232.30 = 66,717.90/x
  3. Step 3: Cross multiply
    155,439x = 233,232.30 × 66,717.90
  4. Step 4: Simplify right side
    155,439x = 15,560,769,268.17
  5. Step 5: Solve for x
    x = 15,560,769,268.17/155,439
  6. Step 6: Final answer
    x = 100,108.53

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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.