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Finding the Fourth Proportional to 86,391.66, 129,548.16 and 36,444.53

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Solution

The fourth proportional to 86,391.66, 129,548.16 and 36,444.53 is: 54,650.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,391.66 : 129,548.16 = 36,444.53 : x
  2. Step 2: Convert to fraction form
    86,391.66/129,548.16 = 36,444.53/x
  3. Step 3: Cross multiply
    86,391.66x = 129,548.16 × 36,444.53
  4. Step 4: Simplify right side
    86,391.66x = 4,721,322,127.44
  5. Step 5: Solve for x
    x = 4,721,322,127.44/86,391.66
  6. Step 6: Final answer
    x = 54,650.20

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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.