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Finding the Fourth Proportional to 87,689.91, 121,011.32 and 47,403.33

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Solution

The fourth proportional to 87,689.91, 121,011.32 and 47,403.33 is: 65,416.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,689.91 : 121,011.32 = 47,403.33 : x
  2. Step 2: Convert to fraction form
    87,689.91/121,011.32 = 47,403.33/x
  3. Step 3: Cross multiply
    87,689.91x = 121,011.32 × 47,403.33
  4. Step 4: Simplify right side
    87,689.91x = 5,736,339,200.41
  5. Step 5: Solve for x
    x = 5,736,339,200.41/87,689.91
  6. Step 6: Final answer
    x = 65,416.18

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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.