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Finding the Fourth Proportional to 86,240.32, 129,230.72 and 48,760

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Solution

The fourth proportional to 86,240.32, 129,230.72 and 48,760 is: 73,066.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,240.32 : 129,230.72 = 48,760 : x
  2. Step 2: Convert to fraction form
    86,240.32/129,230.72 = 48,760/x
  3. Step 3: Cross multiply
    86,240.32x = 129,230.72 × 48,760
  4. Step 4: Simplify right side
    86,240.32x = 6,301,289,907.20
  5. Step 5: Solve for x
    x = 6,301,289,907.20/86,240.32
  6. Step 6: Final answer
    x = 73,066.63

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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.