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Finding the Fourth Proportional to 91,309.50, 137,020.30 and 38,718.99

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Solution

The fourth proportional to 91,309.50, 137,020.30 and 38,718.99 is: 58,102.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,309.50 : 137,020.30 = 38,718.99 : x
  2. Step 2: Convert to fraction form
    91,309.50/137,020.30 = 38,718.99/x
  3. Step 3: Cross multiply
    91,309.50x = 137,020.30 × 38,718.99
  4. Step 4: Simplify right side
    91,309.50x = 5,305,287,528.70
  5. Step 5: Solve for x
    x = 5,305,287,528.70/91,309.50
  6. Step 6: Final answer
    x = 58,102.25

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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.