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Finding the Fourth Proportional to 91,805.70, 137,416.95 and 65,561.70

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Solution

The fourth proportional to 91,805.70, 137,416.95 and 65,561.70 is: 98,134.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,805.70 : 137,416.95 = 65,561.70 : x
  2. Step 2: Convert to fraction form
    91,805.70/137,416.95 = 65,561.70/x
  3. Step 3: Cross multiply
    91,805.70x = 137,416.95 × 65,561.70
  4. Step 4: Simplify right side
    91,805.70x = 9,009,288,850.82
  5. Step 5: Solve for x
    x = 9,009,288,850.82/91,805.70
  6. Step 6: Final answer
    x = 98,134.31

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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.