Home / 81,231.02-121,856.61-28,629.98

Finding the Fourth Proportional to 81,231.02, 121,856.61 and 28,629.98

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Solution

The fourth proportional to 81,231.02, 121,856.61 and 28,629.98 is: 42,948.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,231.02 : 121,856.61 = 28,629.98 : x
  2. Step 2: Convert to fraction form
    81,231.02/121,856.61 = 28,629.98/x
  3. Step 3: Cross multiply
    81,231.02x = 121,856.61 × 28,629.98
  4. Step 4: Simplify right side
    81,231.02x = 3,488,752,307.17
  5. Step 5: Solve for x
    x = 3,488,752,307.17/81,231.02
  6. Step 6: Final answer
    x = 42,948.52

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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.