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Finding the Fourth Proportional to 87,036, 120,110.40 and 47,292

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Solution

The fourth proportional to 87,036, 120,110.40 and 47,292 is: 65,263.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,036 : 120,110.40 = 47,292 : x
  2. Step 2: Convert to fraction form
    87,036/120,110.40 = 47,292/x
  3. Step 3: Cross multiply
    87,036x = 120,110.40 × 47,292
  4. Step 4: Simplify right side
    87,036x = 5,680,261,036.80
  5. Step 5: Solve for x
    x = 5,680,261,036.80/87,036
  6. Step 6: Final answer
    x = 65,263.35

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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.