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Finding the Fourth Proportional to 86,867.70, 130,320.66 and 49,445.40

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Solution

The fourth proportional to 86,867.70, 130,320.66 and 49,445.40 is: 74,178.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,867.70 : 130,320.66 = 49,445.40 : x
  2. Step 2: Convert to fraction form
    86,867.70/130,320.66 = 49,445.40/x
  3. Step 3: Cross multiply
    86,867.70x = 130,320.66 × 49,445.40
  4. Step 4: Simplify right side
    86,867.70x = 6,443,757,161.96
  5. Step 5: Solve for x
    x = 6,443,757,161.96/86,867.70
  6. Step 6: Final answer
    x = 74,178.98

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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.