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Finding the Fourth Proportional to 83,959.71, 115,775.60 and 64,842.59

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Solution

The fourth proportional to 83,959.71, 115,775.60 and 64,842.59 is: 89,414.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,959.71 : 115,775.60 = 64,842.59 : x
  2. Step 2: Convert to fraction form
    83,959.71/115,775.60 = 64,842.59/x
  3. Step 3: Cross multiply
    83,959.71x = 115,775.60 × 64,842.59
  4. Step 4: Simplify right side
    83,959.71x = 7,507,190,092.77
  5. Step 5: Solve for x
    x = 7,507,190,092.77/83,959.71
  6. Step 6: Final answer
    x = 89,414.20

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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.