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Finding the Fourth Proportional to 70,561.52, 105,815.52 and 28,427.30

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Solution

The fourth proportional to 70,561.52, 105,815.52 and 28,427.30 is: 42,630.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,561.52 : 105,815.52 = 28,427.30 : x
  2. Step 2: Convert to fraction form
    70,561.52/105,815.52 = 28,427.30/x
  3. Step 3: Cross multiply
    70,561.52x = 105,815.52 × 28,427.30
  4. Step 4: Simplify right side
    70,561.52x = 3,008,049,531.70
  5. Step 5: Solve for x
    x = 3,008,049,531.70/70,561.52
  6. Step 6: Final answer
    x = 42,630.17

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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.