Home / 90,737.45-135,227.09-86,013.53

Finding the Fourth Proportional to 90,737.45, 135,227.09 and 86,013.53

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Solution

The fourth proportional to 90,737.45, 135,227.09 and 86,013.53 is: 128,186.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,737.45 : 135,227.09 = 86,013.53 : x
  2. Step 2: Convert to fraction form
    90,737.45/135,227.09 = 86,013.53/x
  3. Step 3: Cross multiply
    90,737.45x = 135,227.09 × 86,013.53
  4. Step 4: Simplify right side
    90,737.45x = 11,631,359,362.53
  5. Step 5: Solve for x
    x = 11,631,359,362.53/90,737.45
  6. Step 6: Final answer
    x = 128,186.98

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1.5x scale

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.