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Finding the Fourth Proportional to 100,888.91, 139,223.84 and 54,947.53

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Solution

The fourth proportional to 100,888.91, 139,223.84 and 54,947.53 is: 75,826.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,888.91 : 139,223.84 = 54,947.53 : x
  2. Step 2: Convert to fraction form
    100,888.91/139,223.84 = 54,947.53/x
  3. Step 3: Cross multiply
    100,888.91x = 139,223.84 × 54,947.53
  4. Step 4: Simplify right side
    100,888.91x = 7,650,005,914.42
  5. Step 5: Solve for x
    x = 7,650,005,914.42/100,888.91
  6. Step 6: Final answer
    x = 75,826.03

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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.