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Finding the Fourth Proportional to 70,379.18, 105,572.40 and 17,789.12

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Solution

The fourth proportional to 70,379.18, 105,572.40 and 17,789.12 is: 26,684.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,379.18 : 105,572.40 = 17,789.12 : x
  2. Step 2: Convert to fraction form
    70,379.18/105,572.40 = 17,789.12/x
  3. Step 3: Cross multiply
    70,379.18x = 105,572.40 × 17,789.12
  4. Step 4: Simplify right side
    70,379.18x = 1,878,040,092.29
  5. Step 5: Solve for x
    x = 1,878,040,092.29/70,379.18
  6. Step 6: Final answer
    x = 26,684.60

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1.5x scale

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.