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Finding the Fourth Proportional to 86,486.87, 129,719.56 and 23,311.93

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Solution

The fourth proportional to 86,486.87, 129,719.56 and 23,311.93 is: 34,965.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,486.87 : 129,719.56 = 23,311.93 : x
  2. Step 2: Convert to fraction form
    86,486.87/129,719.56 = 23,311.93/x
  3. Step 3: Cross multiply
    86,486.87x = 129,719.56 × 23,311.93
  4. Step 4: Simplify right side
    86,486.87x = 3,024,013,302.35
  5. Step 5: Solve for x
    x = 3,024,013,302.35/86,486.87
  6. Step 6: Final answer
    x = 34,965.00

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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.