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Finding the Fourth Proportional to 70,559.85, 105,785.43 and 61,186.98

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Solution

The fourth proportional to 70,559.85, 105,785.43 and 61,186.98 is: 91,733.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,559.85 : 105,785.43 = 61,186.98 : x
  2. Step 2: Convert to fraction form
    70,559.85/105,785.43 = 61,186.98/x
  3. Step 3: Cross multiply
    70,559.85x = 105,785.43 × 61,186.98
  4. Step 4: Simplify right side
    70,559.85x = 6,472,690,989.70
  5. Step 5: Solve for x
    x = 6,472,690,989.70/70,559.85
  6. Step 6: Final answer
    x = 91,733.34

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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.