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Finding the Fourth Proportional to 87,707.92, 121,036.92 and 47,421.68

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Solution

The fourth proportional to 87,707.92, 121,036.92 and 47,421.68 is: 65,441.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,707.92 : 121,036.92 = 47,421.68 : x
  2. Step 2: Convert to fraction form
    87,707.92/121,036.92 = 47,421.68/x
  3. Step 3: Cross multiply
    87,707.92x = 121,036.92 × 47,421.68
  4. Step 4: Simplify right side
    87,707.92x = 5,739,774,088.43
  5. Step 5: Solve for x
    x = 5,739,774,088.43/87,707.92
  6. Step 6: Final answer
    x = 65,441.91

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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.