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Finding the Fourth Proportional to 158,529.65, 218,766.17 and 86,907.21

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Solution

The fourth proportional to 158,529.65, 218,766.17 and 86,907.21 is: 119,929.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,529.65 : 218,766.17 = 86,907.21 : x
  2. Step 2: Convert to fraction form
    158,529.65/218,766.17 = 86,907.21/x
  3. Step 3: Cross multiply
    158,529.65x = 218,766.17 × 86,907.21
  4. Step 4: Simplify right side
    158,529.65x = 19,012,357,042.55
  5. Step 5: Solve for x
    x = 19,012,357,042.55/158,529.65
  6. Step 6: Final answer
    x = 119,929.35

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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.