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Finding the Fourth Proportional to 90,980.70, 136,496.36 and 39,693.85

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Solution

The fourth proportional to 90,980.70, 136,496.36 and 39,693.85 is: 59,551.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,980.70 : 136,496.36 = 39,693.85 : x
  2. Step 2: Convert to fraction form
    90,980.70/136,496.36 = 39,693.85/x
  3. Step 3: Cross multiply
    90,980.70x = 136,496.36 × 39,693.85
  4. Step 4: Simplify right side
    90,980.70x = 5,418,065,356.90
  5. Step 5: Solve for x
    x = 5,418,065,356.90/90,980.70
  6. Step 6: Final answer
    x = 59,551.81

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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.