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Finding the Fourth Proportional to 86,895.62, 130,122.84 and 72,818.64

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Solution

The fourth proportional to 86,895.62, 130,122.84 and 72,818.64 is: 109,043.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,895.62 : 130,122.84 = 72,818.64 : x
  2. Step 2: Convert to fraction form
    86,895.62/130,122.84 = 72,818.64/x
  3. Step 3: Cross multiply
    86,895.62x = 130,122.84 × 72,818.64
  4. Step 4: Simplify right side
    86,895.62x = 9,475,368,241.74
  5. Step 5: Solve for x
    x = 9,475,368,241.74/86,895.62
  6. Step 6: Final answer
    x = 109,043.11

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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.