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Finding the Fourth Proportional to 87,620.16, 120,909.12 and 49,886.88

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Solution

The fourth proportional to 87,620.16, 120,909.12 and 49,886.88 is: 68,840.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,620.16 : 120,909.12 = 49,886.88 : x
  2. Step 2: Convert to fraction form
    87,620.16/120,909.12 = 49,886.88/x
  3. Step 3: Cross multiply
    87,620.16x = 120,909.12 × 49,886.88
  4. Step 4: Simplify right side
    87,620.16x = 6,031,778,760.35
  5. Step 5: Solve for x
    x = 6,031,778,760.35/87,620.16
  6. Step 6: Final answer
    x = 68,840.08

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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.