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Finding the Fourth Proportional to 91,708.70, 137,563.05 and 56,668.10

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Solution

The fourth proportional to 91,708.70, 137,563.05 and 56,668.10 is: 85,002.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,708.70 : 137,563.05 = 56,668.10 : x
  2. Step 2: Convert to fraction form
    91,708.70/137,563.05 = 56,668.10/x
  3. Step 3: Cross multiply
    91,708.70x = 137,563.05 × 56,668.10
  4. Step 4: Simplify right side
    91,708.70x = 7,795,436,673.71
  5. Step 5: Solve for x
    x = 7,795,436,673.71/91,708.70
  6. Step 6: Final answer
    x = 85,002.15

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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.