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Finding the Fourth Proportional to 70,359.84, 105,538.68 and 28,250.64

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Solution

The fourth proportional to 70,359.84, 105,538.68 and 28,250.64 is: 42,375.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,359.84 : 105,538.68 = 28,250.64 : x
  2. Step 2: Convert to fraction form
    70,359.84/105,538.68 = 28,250.64/x
  3. Step 3: Cross multiply
    70,359.84x = 105,538.68 × 28,250.64
  4. Step 4: Simplify right side
    70,359.84x = 2,981,535,254.76
  5. Step 5: Solve for x
    x = 2,981,535,254.76/70,359.84
  6. Step 6: Final answer
    x = 42,375.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.