Home / 80,710.29-121,066.02-28,119.60

Finding the Fourth Proportional to 80,710.29, 121,066.02 and 28,119.60

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Solution

The fourth proportional to 80,710.29, 121,066.02 and 28,119.60 is: 42,179.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,710.29 : 121,066.02 = 28,119.60 : x
  2. Step 2: Convert to fraction form
    80,710.29/121,066.02 = 28,119.60/x
  3. Step 3: Cross multiply
    80,710.29x = 121,066.02 × 28,119.60
  4. Step 4: Simplify right side
    80,710.29x = 3,404,328,055.99
  5. Step 5: Solve for x
    x = 3,404,328,055.99/80,710.29
  6. Step 6: Final answer
    x = 42,179.60

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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.