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Finding the Fourth Proportional to 99,454.40, 149,726 and 90,745.28

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Solution

The fourth proportional to 99,454.40, 149,726 and 90,745.28 is: 136,614.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,454.40 : 149,726 = 90,745.28 : x
  2. Step 2: Convert to fraction form
    99,454.40/149,726 = 90,745.28/x
  3. Step 3: Cross multiply
    99,454.40x = 149,726 × 90,745.28
  4. Step 4: Simplify right side
    99,454.40x = 13,586,927,793.28
  5. Step 5: Solve for x
    x = 13,586,927,793.28/99,454.40
  6. Step 6: Final answer
    x = 136,614.65

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.