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Finding the Fourth Proportional to 87,937, 121,518.66 and 66,676.84

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Solution

The fourth proportional to 87,937, 121,518.66 and 66,676.84 is: 92,139.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,937 : 121,518.66 = 66,676.84 : x
  2. Step 2: Convert to fraction form
    87,937/121,518.66 = 66,676.84/x
  3. Step 3: Cross multiply
    87,937x = 121,518.66 × 66,676.84
  4. Step 4: Simplify right side
    87,937x = 8,102,480,249.83
  5. Step 5: Solve for x
    x = 8,102,480,249.83/87,937
  6. Step 6: Final answer
    x = 92,139.60

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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.