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Finding the Fourth Proportional to 70,248.07, 105,372.20 and 28,695.07

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Solution

The fourth proportional to 70,248.07, 105,372.20 and 28,695.07 is: 43,042.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,248.07 : 105,372.20 = 28,695.07 : x
  2. Step 2: Convert to fraction form
    70,248.07/105,372.20 = 28,695.07/x
  3. Step 3: Cross multiply
    70,248.07x = 105,372.20 × 28,695.07
  4. Step 4: Simplify right side
    70,248.07x = 3,023,662,655.05
  5. Step 5: Solve for x
    x = 3,023,662,655.05/70,248.07
  6. Step 6: Final answer
    x = 43,042.64

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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.