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Finding the Fourth Proportional to 84,521.75, 116,404.70 and 65,330.82

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Solution

The fourth proportional to 84,521.75, 116,404.70 and 65,330.82 is: 89,974.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,521.75 : 116,404.70 = 65,330.82 : x
  2. Step 2: Convert to fraction form
    84,521.75/116,404.70 = 65,330.82/x
  3. Step 3: Cross multiply
    84,521.75x = 116,404.70 × 65,330.82
  4. Step 4: Simplify right side
    84,521.75x = 7,604,814,176.20
  5. Step 5: Solve for x
    x = 7,604,814,176.20/84,521.75
  6. Step 6: Final answer
    x = 89,974.65

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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.