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Finding the Fourth Proportional to 215,129.80, 322,694.70 and 155,686.60

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Solution

The fourth proportional to 215,129.80, 322,694.70 and 155,686.60 is: 233,529.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,129.80 : 322,694.70 = 155,686.60 : x
  2. Step 2: Convert to fraction form
    215,129.80/322,694.70 = 155,686.60/x
  3. Step 3: Cross multiply
    215,129.80x = 322,694.70 × 155,686.60
  4. Step 4: Simplify right side
    215,129.80x = 50,239,240,681.02
  5. Step 5: Solve for x
    x = 50,239,240,681.02/215,129.80
  6. Step 6: Final answer
    x = 233,529.90

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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.