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Finding the Fourth Proportional to 156,987.65, 235,481.48 and 155,511.43

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Solution

The fourth proportional to 156,987.65, 235,481.48 and 155,511.43 is: 233,267.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,987.65 : 235,481.48 = 155,511.43 : x
  2. Step 2: Convert to fraction form
    156,987.65/235,481.48 = 155,511.43/x
  3. Step 3: Cross multiply
    156,987.65x = 235,481.48 × 155,511.43
  4. Step 4: Simplify right side
    156,987.65x = 36,620,061,693.32
  5. Step 5: Solve for x
    x = 36,620,061,693.32/156,987.65
  6. Step 6: Final answer
    x = 233,267.15

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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.