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Finding the Fourth Proportional to 75,586.92, 112,819.80 and 66,729.48

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Solution

The fourth proportional to 75,586.92, 112,819.80 and 66,729.48 is: 99,599.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,586.92 : 112,819.80 = 66,729.48 : x
  2. Step 2: Convert to fraction form
    75,586.92/112,819.80 = 66,729.48/x
  3. Step 3: Cross multiply
    75,586.92x = 112,819.80 × 66,729.48
  4. Step 4: Simplify right side
    75,586.92x = 7,528,406,587.70
  5. Step 5: Solve for x
    x = 7,528,406,587.70/75,586.92
  6. Step 6: Final answer
    x = 99,599.33

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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.