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Finding the Fourth Proportional to 70,500.48, 105,670.08 and 28,896

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Solution

The fourth proportional to 70,500.48, 105,670.08 and 28,896 is: 43,310.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,500.48 : 105,670.08 = 28,896 : x
  2. Step 2: Convert to fraction form
    70,500.48/105,670.08 = 28,896/x
  3. Step 3: Cross multiply
    70,500.48x = 105,670.08 × 28,896
  4. Step 4: Simplify right side
    70,500.48x = 3,053,442,631.68
  5. Step 5: Solve for x
    x = 3,053,442,631.68/70,500.48
  6. Step 6: Final answer
    x = 43,310.95

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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.