Home / 87,689.50-121,011.37-47,403.30

Finding the Fourth Proportional to 87,689.50, 121,011.37 and 47,403.30

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Solution

The fourth proportional to 87,689.50, 121,011.37 and 47,403.30 is: 65,416.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,689.50 : 121,011.37 = 47,403.30 : x
  2. Step 2: Convert to fraction form
    87,689.50/121,011.37 = 47,403.30/x
  3. Step 3: Cross multiply
    87,689.50x = 121,011.37 × 47,403.30
  4. Step 4: Simplify right side
    87,689.50x = 5,736,338,275.52
  5. Step 5: Solve for x
    x = 5,736,338,275.52/87,689.50
  6. Step 6: Final answer
    x = 65,416.48

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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.