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Finding the Fourth Proportional to 92,876.68, 128,172.36 and 54,638.92

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Solution

The fourth proportional to 92,876.68, 128,172.36 and 54,638.92 is: 75,403.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,876.68 : 128,172.36 = 54,638.92 : x
  2. Step 2: Convert to fraction form
    92,876.68/128,172.36 = 54,638.92/x
  3. Step 3: Cross multiply
    92,876.68x = 128,172.36 × 54,638.92
  4. Step 4: Simplify right side
    92,876.68x = 7,003,199,324.25
  5. Step 5: Solve for x
    x = 7,003,199,324.25/92,876.68
  6. Step 6: Final answer
    x = 75,403.20

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1.5x scale

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.