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Finding the Fourth Proportional to 86,702.85, 130,052.45 and 39,955.73

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Solution

The fourth proportional to 86,702.85, 130,052.45 and 39,955.73 is: 59,932.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,702.85 : 130,052.45 = 39,955.73 : x
  2. Step 2: Convert to fraction form
    86,702.85/130,052.45 = 39,955.73/x
  3. Step 3: Cross multiply
    86,702.85x = 130,052.45 × 39,955.73
  4. Step 4: Simplify right side
    86,702.85x = 5,196,340,027.67
  5. Step 5: Solve for x
    x = 5,196,340,027.67/86,702.85
  6. Step 6: Final answer
    x = 59,932.75

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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.