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Finding the Fourth Proportional to 77,263.80, 115,871.12 and 39,819.12

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Solution

The fourth proportional to 77,263.80, 115,871.12 and 39,819.12 is: 59,716.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,263.80 : 115,871.12 = 39,819.12 : x
  2. Step 2: Convert to fraction form
    77,263.80/115,871.12 = 39,819.12/x
  3. Step 3: Cross multiply
    77,263.80x = 115,871.12 × 39,819.12
  4. Step 4: Simplify right side
    77,263.80x = 4,613,886,031.81
  5. Step 5: Solve for x
    x = 4,613,886,031.81/77,263.80
  6. Step 6: Final answer
    x = 59,716.01

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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.