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Finding the Fourth Proportional to 70,755.16, 105,899.46 and 39,116.56

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Solution

The fourth proportional to 70,755.16, 105,899.46 and 39,116.56 is: 58,545.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,755.16 : 105,899.46 = 39,116.56 : x
  2. Step 2: Convert to fraction form
    70,755.16/105,899.46 = 39,116.56/x
  3. Step 3: Cross multiply
    70,755.16x = 105,899.46 × 39,116.56
  4. Step 4: Simplify right side
    70,755.16x = 4,142,422,581.06
  5. Step 5: Solve for x
    x = 4,142,422,581.06/70,755.16
  6. Step 6: Final answer
    x = 58,545.87

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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.