Home / 87,971.69-121,401.20-47,685.62

Finding the Fourth Proportional to 87,971.69, 121,401.20 and 47,685.62

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Solution

The fourth proportional to 87,971.69, 121,401.20 and 47,685.62 is: 65,806.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,971.69 : 121,401.20 = 47,685.62 : x
  2. Step 2: Convert to fraction form
    87,971.69/121,401.20 = 47,685.62/x
  3. Step 3: Cross multiply
    87,971.69x = 121,401.20 × 47,685.62
  4. Step 4: Simplify right side
    87,971.69x = 5,789,091,490.74
  5. Step 5: Solve for x
    x = 5,789,091,490.74/87,971.69
  6. Step 6: Final answer
    x = 65,806.30

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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.