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Finding the Fourth Proportional to 43,319, 64,861.68 and 28,288.88

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Solution

The fourth proportional to 43,319, 64,861.68 and 28,288.88 is: 42,357.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,319 : 64,861.68 = 28,288.88 : x
  2. Step 2: Convert to fraction form
    43,319/64,861.68 = 28,288.88/x
  3. Step 3: Cross multiply
    43,319x = 64,861.68 × 28,288.88
  4. Step 4: Simplify right side
    43,319x = 1,834,864,282.12
  5. Step 5: Solve for x
    x = 1,834,864,282.12/43,319
  6. Step 6: Final answer
    x = 42,357.03

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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.