Home / 91,361.34-136,990.17-66,685.50

Finding the Fourth Proportional to 91,361.34, 136,990.17 and 66,685.50

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Solution

The fourth proportional to 91,361.34, 136,990.17 and 66,685.50 is: 99,990.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,361.34 : 136,990.17 = 66,685.50 : x
  2. Step 2: Convert to fraction form
    91,361.34/136,990.17 = 66,685.50/x
  3. Step 3: Cross multiply
    91,361.34x = 136,990.17 × 66,685.50
  4. Step 4: Simplify right side
    91,361.34x = 9,135,257,981.54
  5. Step 5: Solve for x
    x = 9,135,257,981.54/91,361.34
  6. Step 6: Final answer
    x = 99,990.41

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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.