Home / 81,851.73-112,970.89-51,239.05

Finding the Fourth Proportional to 81,851.73, 112,970.89 and 51,239.05

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Solution

The fourth proportional to 81,851.73, 112,970.89 and 51,239.05 is: 70,719.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,851.73 : 112,970.89 = 51,239.05 : x
  2. Step 2: Convert to fraction form
    81,851.73/112,970.89 = 51,239.05/x
  3. Step 3: Cross multiply
    81,851.73x = 112,970.89 × 51,239.05
  4. Step 4: Simplify right side
    81,851.73x = 5,788,520,862.88
  5. Step 5: Solve for x
    x = 5,788,520,862.88/81,851.73
  6. Step 6: Final answer
    x = 70,719.59

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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.