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Finding the Fourth Proportional to 158,476.65, 218,703.32 and 86,856.66

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Solution

The fourth proportional to 158,476.65, 218,703.32 and 86,856.66 is: 119,865.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,476.65 : 218,703.32 = 86,856.66 : x
  2. Step 2: Convert to fraction form
    158,476.65/218,703.32 = 86,856.66/x
  3. Step 3: Cross multiply
    158,476.65x = 218,703.32 × 86,856.66
  4. Step 4: Simplify right side
    158,476.65x = 18,995,839,471.83
  5. Step 5: Solve for x
    x = 18,995,839,471.83/158,476.65
  6. Step 6: Final answer
    x = 119,865.23

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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.