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Finding the Fourth Proportional to 70,387.90, 105,597.44 and 38,781.69

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Solution

The fourth proportional to 70,387.90, 105,597.44 and 38,781.69 is: 58,181.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,387.90 : 105,597.44 = 38,781.69 : x
  2. Step 2: Convert to fraction form
    70,387.90/105,597.44 = 38,781.69/x
  3. Step 3: Cross multiply
    70,387.90x = 105,597.44 × 38,781.69
  4. Step 4: Simplify right side
    70,387.90x = 4,095,247,182.87
  5. Step 5: Solve for x
    x = 4,095,247,182.87/70,387.90
  6. Step 6: Final answer
    x = 58,181.12

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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.