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Finding the Fourth Proportional to 155,687.80, 233,531.70 and 120,695.80

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Solution

The fourth proportional to 155,687.80, 233,531.70 and 120,695.80 is: 181,043.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,687.80 : 233,531.70 = 120,695.80 : x
  2. Step 2: Convert to fraction form
    155,687.80/233,531.70 = 120,695.80/x
  3. Step 3: Cross multiply
    155,687.80x = 233,531.70 × 120,695.80
  4. Step 4: Simplify right side
    155,687.80x = 28,186,295,356.86
  5. Step 5: Solve for x
    x = 28,186,295,356.86/155,687.80
  6. Step 6: Final answer
    x = 181,043.70

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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.