Home / 91,082.53-135,718.34-81,145.45

Finding the Fourth Proportional to 91,082.53, 135,718.34 and 81,145.45

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Solution

The fourth proportional to 91,082.53, 135,718.34 and 81,145.45 is: 120,911.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,082.53 : 135,718.34 = 81,145.45 : x
  2. Step 2: Convert to fraction form
    91,082.53/135,718.34 = 81,145.45/x
  3. Step 3: Cross multiply
    91,082.53x = 135,718.34 × 81,145.45
  4. Step 4: Simplify right side
    91,082.53x = 11,012,925,772.55
  5. Step 5: Solve for x
    x = 11,012,925,772.55/91,082.53
  6. Step 6: Final answer
    x = 120,911.50

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.