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Finding the Fourth Proportional to 81,703.84, 121,959.56 and 70,091.68

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Solution

The fourth proportional to 81,703.84, 121,959.56 and 70,091.68 is: 104,626.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,703.84 : 121,959.56 = 70,091.68 : x
  2. Step 2: Convert to fraction form
    81,703.84/121,959.56 = 70,091.68/x
  3. Step 3: Cross multiply
    81,703.84x = 121,959.56 × 70,091.68
  4. Step 4: Simplify right side
    81,703.84x = 8,548,350,452.46
  5. Step 5: Solve for x
    x = 8,548,350,452.46/81,703.84
  6. Step 6: Final answer
    x = 104,626.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.