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Finding the Fourth Proportional to 83,597.40, 126,140.81 and 80,357.08

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Solution

The fourth proportional to 83,597.40, 126,140.81 and 80,357.08 is: 121,251.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,597.40 : 126,140.81 = 80,357.08 : x
  2. Step 2: Convert to fraction form
    83,597.40/126,140.81 = 80,357.08/x
  3. Step 3: Cross multiply
    83,597.40x = 126,140.81 × 80,357.08
  4. Step 4: Simplify right side
    83,597.40x = 10,136,307,160.43
  5. Step 5: Solve for x
    x = 10,136,307,160.43/83,597.40
  6. Step 6: Final answer
    x = 121,251.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.