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Finding the Fourth Proportional to 86,367.43, 129,258.53 and 53,108.56

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Solution

The fourth proportional to 86,367.43, 129,258.53 and 53,108.56 is: 79,482.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,367.43 : 129,258.53 = 53,108.56 : x
  2. Step 2: Convert to fraction form
    86,367.43/129,258.53 = 53,108.56/x
  3. Step 3: Cross multiply
    86,367.43x = 129,258.53 × 53,108.56
  4. Step 4: Simplify right side
    86,367.43x = 6,864,733,484.18
  5. Step 5: Solve for x
    x = 6,864,733,484.18/86,367.43
  6. Step 6: Final answer
    x = 79,482.90

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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.