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Finding the Fourth Proportional to 92,641.78, 138,630.50 and 80,204.60

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Solution

The fourth proportional to 92,641.78, 138,630.50 and 80,204.60 is: 120,019.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,641.78 : 138,630.50 = 80,204.60 : x
  2. Step 2: Convert to fraction form
    92,641.78/138,630.50 = 80,204.60/x
  3. Step 3: Cross multiply
    92,641.78x = 138,630.50 × 80,204.60
  4. Step 4: Simplify right side
    92,641.78x = 11,118,803,800.30
  5. Step 5: Solve for x
    x = 11,118,803,800.30/92,641.78
  6. Step 6: Final answer
    x = 120,019.32

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1.5x scale

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.