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Finding the Fourth Proportional to 143,987.32, 216,046.62 and 73,915.88

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Solution

The fourth proportional to 143,987.32, 216,046.62 and 73,915.88 is: 110,907.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,987.32 : 216,046.62 = 73,915.88 : x
  2. Step 2: Convert to fraction form
    143,987.32/216,046.62 = 73,915.88/x
  3. Step 3: Cross multiply
    143,987.32x = 216,046.62 × 73,915.88
  4. Step 4: Simplify right side
    143,987.32x = 15,969,276,038.33
  5. Step 5: Solve for x
    x = 15,969,276,038.33/143,987.32
  6. Step 6: Final answer
    x = 110,907.52

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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.