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Finding the Fourth Proportional to 158,218.80, 218,340.28 and 85,620.10

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Solution

The fourth proportional to 158,218.80, 218,340.28 and 85,620.10 is: 118,154.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,218.80 : 218,340.28 = 85,620.10 : x
  2. Step 2: Convert to fraction form
    158,218.80/218,340.28 = 85,620.10/x
  3. Step 3: Cross multiply
    158,218.80x = 218,340.28 × 85,620.10
  4. Step 4: Simplify right side
    158,218.80x = 18,694,316,607.63
  5. Step 5: Solve for x
    x = 18,694,316,607.63/158,218.80
  6. Step 6: Final answer
    x = 118,154.84

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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.