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Finding the Fourth Proportional to 128,988.65, 193,445.62 and 44,745.41

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Solution

The fourth proportional to 128,988.65, 193,445.62 and 44,745.41 is: 67,105.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,988.65 : 193,445.62 = 44,745.41 : x
  2. Step 2: Convert to fraction form
    128,988.65/193,445.62 = 44,745.41/x
  3. Step 3: Cross multiply
    128,988.65x = 193,445.62 × 44,745.41
  4. Step 4: Simplify right side
    128,988.65x = 8,655,803,951.35
  5. Step 5: Solve for x
    x = 8,655,803,951.35/128,988.65
  6. Step 6: Final answer
    x = 67,105.16

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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.