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Finding the Fourth Proportional to 218,724.37, 328,290.68 and 112,188.31

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Solution

The fourth proportional to 218,724.37, 328,290.68 and 112,188.31 is: 168,387.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,724.37 : 328,290.68 = 112,188.31 : x
  2. Step 2: Convert to fraction form
    218,724.37/328,290.68 = 112,188.31/x
  3. Step 3: Cross multiply
    218,724.37x = 328,290.68 × 112,188.31
  4. Step 4: Simplify right side
    218,724.37x = 36,830,376,577.95
  5. Step 5: Solve for x
    x = 36,830,376,577.95/218,724.37
  6. Step 6: Final answer
    x = 168,387.16

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1.5x scale

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.