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Finding the Fourth Proportional to 64,961.90, 89,671.25 and 38,126.90

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Solution

The fourth proportional to 64,961.90, 89,671.25 and 38,126.90 is: 52,629.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,961.90 : 89,671.25 = 38,126.90 : x
  2. Step 2: Convert to fraction form
    64,961.90/89,671.25 = 38,126.90/x
  3. Step 3: Cross multiply
    64,961.90x = 89,671.25 × 38,126.90
  4. Step 4: Simplify right side
    64,961.90x = 3,418,887,101.12
  5. Step 5: Solve for x
    x = 3,418,887,101.12/64,961.90
  6. Step 6: Final answer
    x = 52,629.11

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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.