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Finding the Fourth Proportional to 66,465.76, 99,658.52 and 26,490.90

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Solution

The fourth proportional to 66,465.76, 99,658.52 and 26,490.90 is: 39,720.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,465.76 : 99,658.52 = 26,490.90 : x
  2. Step 2: Convert to fraction form
    66,465.76/99,658.52 = 26,490.90/x
  3. Step 3: Cross multiply
    66,465.76x = 99,658.52 × 26,490.90
  4. Step 4: Simplify right side
    66,465.76x = 2,640,043,887.47
  5. Step 5: Solve for x
    x = 2,640,043,887.47/66,465.76
  6. Step 6: Final answer
    x = 39,720.36

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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.