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Finding the Fourth Proportional to 70,529.78, 105,795.06 and 17,939.30

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Solution

The fourth proportional to 70,529.78, 105,795.06 and 17,939.30 is: 26,909.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,529.78 : 105,795.06 = 17,939.30 : x
  2. Step 2: Convert to fraction form
    70,529.78/105,795.06 = 17,939.30/x
  3. Step 3: Cross multiply
    70,529.78x = 105,795.06 × 17,939.30
  4. Step 4: Simplify right side
    70,529.78x = 1,897,889,319.86
  5. Step 5: Solve for x
    x = 1,897,889,319.86/70,529.78
  6. Step 6: Final answer
    x = 26,909.05

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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.