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Finding the Fourth Proportional to 155,014.59, 213,918.26 and 87,029.88

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Solution

The fourth proportional to 155,014.59, 213,918.26 and 87,029.88 is: 120,100.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,014.59 : 213,918.26 = 87,029.88 : x
  2. Step 2: Convert to fraction form
    155,014.59/213,918.26 = 87,029.88/x
  3. Step 3: Cross multiply
    155,014.59x = 213,918.26 × 87,029.88
  4. Step 4: Simplify right side
    155,014.59x = 18,617,280,497.61
  5. Step 5: Solve for x
    x = 18,617,280,497.61/155,014.59
  6. Step 6: Final answer
    x = 120,100.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.