Home / 91,824.60-137,721.78-85,847.16

Finding the Fourth Proportional to 91,824.60, 137,721.78 and 85,847.16

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Solution

The fourth proportional to 91,824.60, 137,721.78 and 85,847.16 is: 128,756.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,824.60 : 137,721.78 = 85,847.16 : x
  2. Step 2: Convert to fraction form
    91,824.60/137,721.78 = 85,847.16/x
  3. Step 3: Cross multiply
    91,824.60x = 137,721.78 × 85,847.16
  4. Step 4: Simplify right side
    91,824.60x = 11,823,023,683.14
  5. Step 5: Solve for x
    x = 11,823,023,683.14/91,824.60
  6. Step 6: Final answer
    x = 128,756.60

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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.