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Finding the Fourth Proportional to 70,253.68, 105,379.96 and 28,671.52

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Solution

The fourth proportional to 70,253.68, 105,379.96 and 28,671.52 is: 43,007.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,253.68 : 105,379.96 = 28,671.52 : x
  2. Step 2: Convert to fraction form
    70,253.68/105,379.96 = 28,671.52/x
  3. Step 3: Cross multiply
    70,253.68x = 105,379.96 × 28,671.52
  4. Step 4: Simplify right side
    70,253.68x = 3,021,403,630.74
  5. Step 5: Solve for x
    x = 3,021,403,630.74/70,253.68
  6. Step 6: Final answer
    x = 43,007.05

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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.