Home / 80,926.12-121,352.80-30,971.28

Finding the Fourth Proportional to 80,926.12, 121,352.80 and 30,971.28

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Solution

The fourth proportional to 80,926.12, 121,352.80 and 30,971.28 is: 46,443.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,926.12 : 121,352.80 = 30,971.28 : x
  2. Step 2: Convert to fraction form
    80,926.12/121,352.80 = 30,971.28/x
  3. Step 3: Cross multiply
    80,926.12x = 121,352.80 × 30,971.28
  4. Step 4: Simplify right side
    80,926.12x = 3,758,451,547.58
  5. Step 5: Solve for x
    x = 3,758,451,547.58/80,926.12
  6. Step 6: Final answer
    x = 46,443.00

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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.