Home / 103,481.10-155,221.65-86,750.55

Finding the Fourth Proportional to 103,481.10, 155,221.65 and 86,750.55

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Solution

The fourth proportional to 103,481.10, 155,221.65 and 86,750.55 is: 130,125.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,481.10 : 155,221.65 = 86,750.55 : x
  2. Step 2: Convert to fraction form
    103,481.10/155,221.65 = 86,750.55/x
  3. Step 3: Cross multiply
    103,481.10x = 155,221.65 × 86,750.55
  4. Step 4: Simplify right side
    103,481.10x = 13,465,563,509.41
  5. Step 5: Solve for x
    x = 13,465,563,509.41/103,481.10
  6. Step 6: Final answer
    x = 130,125.83

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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.