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Finding the Fourth Proportional to 86,248, 129,372 and 23,918.50

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Solution

The fourth proportional to 86,248, 129,372 and 23,918.50 is: 35,877.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,248 : 129,372 = 23,918.50 : x
  2. Step 2: Convert to fraction form
    86,248/129,372 = 23,918.50/x
  3. Step 3: Cross multiply
    86,248x = 129,372 × 23,918.50
  4. Step 4: Simplify right side
    86,248x = 3,094,384,182
  5. Step 5: Solve for x
    x = 3,094,384,182/86,248
  6. Step 6: Final answer
    x = 35,877.75

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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.