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Finding the Fourth Proportional to 87,144.75, 120,259.76 and 47,400.75

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Solution

The fourth proportional to 87,144.75, 120,259.76 and 47,400.75 is: 65,413.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,144.75 : 120,259.76 = 47,400.75 : x
  2. Step 2: Convert to fraction form
    87,144.75/120,259.76 = 47,400.75/x
  3. Step 3: Cross multiply
    87,144.75x = 120,259.76 × 47,400.75
  4. Step 4: Simplify right side
    87,144.75x = 5,700,402,581.82
  5. Step 5: Solve for x
    x = 5,700,402,581.82/87,144.75
  6. Step 6: Final answer
    x = 65,413.04

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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.