Home / 155,957.20-215,279.27-121,433.68

Finding the Fourth Proportional to 155,957.20, 215,279.27 and 121,433.68

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Solution

The fourth proportional to 155,957.20, 215,279.27 and 121,433.68 is: 167,623.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,957.20 : 215,279.27 = 121,433.68 : x
  2. Step 2: Convert to fraction form
    155,957.20/215,279.27 = 121,433.68/x
  3. Step 3: Cross multiply
    155,957.20x = 215,279.27 × 121,433.68
  4. Step 4: Simplify right side
    155,957.20x = 26,142,153,983.81
  5. Step 5: Solve for x
    x = 26,142,153,983.81/155,957.20
  6. Step 6: Final answer
    x = 167,623.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.