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Finding the Fourth Proportional to 87,286.40, 130,948.20 and 49,864.40

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Solution

The fourth proportional to 87,286.40, 130,948.20 and 49,864.40 is: 74,807.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,286.40 : 130,948.20 = 49,864.40 : x
  2. Step 2: Convert to fraction form
    87,286.40/130,948.20 = 49,864.40/x
  3. Step 3: Cross multiply
    87,286.40x = 130,948.20 × 49,864.40
  4. Step 4: Simplify right side
    87,286.40x = 6,529,653,424.08
  5. Step 5: Solve for x
    x = 6,529,653,424.08/87,286.40
  6. Step 6: Final answer
    x = 74,807.23

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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.