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Finding the Fourth Proportional to 158,369.28, 218,549.64 and 86,750.64

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Solution

The fourth proportional to 158,369.28, 218,549.64 and 86,750.64 is: 119,715.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,369.28 : 218,549.64 = 86,750.64 : x
  2. Step 2: Convert to fraction form
    158,369.28/218,549.64 = 86,750.64/x
  3. Step 3: Cross multiply
    158,369.28x = 218,549.64 × 86,750.64
  4. Step 4: Simplify right side
    158,369.28x = 18,959,321,141.77
  5. Step 5: Solve for x
    x = 18,959,321,141.77/158,369.28
  6. Step 6: Final answer
    x = 119,715.90

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1.5x scale

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.