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Finding the Fourth Proportional to 92,077.80, 138,116.70 and 68,749.80

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Solution

The fourth proportional to 92,077.80, 138,116.70 and 68,749.80 is: 103,124.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,077.80 : 138,116.70 = 68,749.80 : x
  2. Step 2: Convert to fraction form
    92,077.80/138,116.70 = 68,749.80/x
  3. Step 3: Cross multiply
    92,077.80x = 138,116.70 × 68,749.80
  4. Step 4: Simplify right side
    92,077.80x = 9,495,495,501.66
  5. Step 5: Solve for x
    x = 9,495,495,501.66/92,077.80
  6. Step 6: Final answer
    x = 103,124.70

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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.