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Finding the Fourth Proportional to 86,402.93, 129,311.78 and 53,144.06

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Solution

The fourth proportional to 86,402.93, 129,311.78 and 53,144.06 is: 79,536.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,402.93 : 129,311.78 = 53,144.06 : x
  2. Step 2: Convert to fraction form
    86,402.93/129,311.78 = 53,144.06/x
  3. Step 3: Cross multiply
    86,402.93x = 129,311.78 × 53,144.06
  4. Step 4: Simplify right side
    86,402.93x = 6,872,152,082.75
  5. Step 5: Solve for x
    x = 6,872,152,082.75/86,402.93
  6. Step 6: Final answer
    x = 79,536.10

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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.