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Finding the Fourth Proportional to 158,549.99, 218,797.31 and 86,929.83

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Solution

The fourth proportional to 158,549.99, 218,797.31 and 86,929.83 is: 119,962.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,549.99 : 218,797.31 = 86,929.83 : x
  2. Step 2: Convert to fraction form
    158,549.99/218,797.31 = 86,929.83/x
  3. Step 3: Cross multiply
    158,549.99x = 218,797.31 × 86,929.83
  4. Step 4: Simplify right side
    158,549.99x = 19,020,013,180.08
  5. Step 5: Solve for x
    x = 19,020,013,180.08/158,549.99
  6. Step 6: Final answer
    x = 119,962.25

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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.