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Finding the Fourth Proportional to 80,987.97, 121,482.77 and 28,398.72

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Solution

The fourth proportional to 80,987.97, 121,482.77 and 28,398.72 is: 42,598.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,987.97 : 121,482.77 = 28,398.72 : x
  2. Step 2: Convert to fraction form
    80,987.97/121,482.77 = 28,398.72/x
  3. Step 3: Cross multiply
    80,987.97x = 121,482.77 × 28,398.72
  4. Step 4: Simplify right side
    80,987.97x = 3,449,955,028.06
  5. Step 5: Solve for x
    x = 3,449,955,028.06/80,987.97
  6. Step 6: Final answer
    x = 42,598.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.