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Finding the Fourth Proportional to 132,878.40, 199,624.80 and 91,406.40

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Solution

The fourth proportional to 132,878.40, 199,624.80 and 91,406.40 is: 137,320.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,878.40 : 199,624.80 = 91,406.40 : x
  2. Step 2: Convert to fraction form
    132,878.40/199,624.80 = 91,406.40/x
  3. Step 3: Cross multiply
    132,878.40x = 199,624.80 × 91,406.40
  4. Step 4: Simplify right side
    132,878.40x = 18,246,984,318.72
  5. Step 5: Solve for x
    x = 18,246,984,318.72/132,878.40
  6. Step 6: Final answer
    x = 137,320.92

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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.