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Finding the Fourth Proportional to 154,677.28, 213,454.56 and 87,609.28

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Solution

The fourth proportional to 154,677.28, 213,454.56 and 87,609.28 is: 120,900.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,677.28 : 213,454.56 = 87,609.28 : x
  2. Step 2: Convert to fraction form
    154,677.28/213,454.56 = 87,609.28/x
  3. Step 3: Cross multiply
    154,677.28x = 213,454.56 × 87,609.28
  4. Step 4: Simplify right side
    154,677.28x = 18,700,600,314.32
  5. Step 5: Solve for x
    x = 18,700,600,314.32/154,677.28
  6. Step 6: Final answer
    x = 120,900.76

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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.