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Finding the Fourth Proportional to 70,610.52, 105,914.40 and 28,489.74

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Solution

The fourth proportional to 70,610.52, 105,914.40 and 28,489.74 is: 42,734.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,610.52 : 105,914.40 = 28,489.74 : x
  2. Step 2: Convert to fraction form
    70,610.52/105,914.40 = 28,489.74/x
  3. Step 3: Cross multiply
    70,610.52x = 105,914.40 × 28,489.74
  4. Step 4: Simplify right side
    70,610.52x = 3,017,473,718.26
  5. Step 5: Solve for x
    x = 3,017,473,718.26/70,610.52
  6. Step 6: Final answer
    x = 42,734.05

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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.