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Finding the Fourth Proportional to 100,263.40, 138,363.52 and 54,941.02

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Solution

The fourth proportional to 100,263.40, 138,363.52 and 54,941.02 is: 75,818.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,263.40 : 138,363.52 = 54,941.02 : x
  2. Step 2: Convert to fraction form
    100,263.40/138,363.52 = 54,941.02/x
  3. Step 3: Cross multiply
    100,263.40x = 138,363.52 × 54,941.02
  4. Step 4: Simplify right side
    100,263.40x = 7,601,832,919.59
  5. Step 5: Solve for x
    x = 7,601,832,919.59/100,263.40
  6. Step 6: Final answer
    x = 75,818.62

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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.