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Finding the Fourth Proportional to 154,665.28, 213,438 and 87,597.28

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Solution

The fourth proportional to 154,665.28, 213,438 and 87,597.28 is: 120,884.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,665.28 : 213,438 = 87,597.28 : x
  2. Step 2: Convert to fraction form
    154,665.28/213,438 = 87,597.28/x
  3. Step 3: Cross multiply
    154,665.28x = 213,438 × 87,597.28
  4. Step 4: Simplify right side
    154,665.28x = 18,696,588,248.64
  5. Step 5: Solve for x
    x = 18,696,588,248.64/154,665.28
  6. Step 6: Final answer
    x = 120,884.20

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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.