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Finding the Fourth Proportional to 70,155.68, 105,279.65 and 25,782.81

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Solution

The fourth proportional to 70,155.68, 105,279.65 and 25,782.81 is: 38,691.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,155.68 : 105,279.65 = 25,782.81 : x
  2. Step 2: Convert to fraction form
    70,155.68/105,279.65 = 25,782.81/x
  3. Step 3: Cross multiply
    70,155.68x = 105,279.65 × 25,782.81
  4. Step 4: Simplify right side
    70,155.68x = 2,714,405,083.90
  5. Step 5: Solve for x
    x = 2,714,405,083.90/70,155.68
  6. Step 6: Final answer
    x = 38,691.17

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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.