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Finding the Fourth Proportional to 86,702.04, 129,990 and 58,552.32

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Solution

The fourth proportional to 86,702.04, 129,990 and 58,552.32 is: 87,785.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,702.04 : 129,990 = 58,552.32 : x
  2. Step 2: Convert to fraction form
    86,702.04/129,990 = 58,552.32/x
  3. Step 3: Cross multiply
    86,702.04x = 129,990 × 58,552.32
  4. Step 4: Simplify right side
    86,702.04x = 7,611,216,076.80
  5. Step 5: Solve for x
    x = 7,611,216,076.80/86,702.04
  6. Step 6: Final answer
    x = 87,785.89

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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.