Home / 90,981.36-136,548.72-38,428.56

Finding the Fourth Proportional to 90,981.36, 136,548.72 and 38,428.56

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Solution

The fourth proportional to 90,981.36, 136,548.72 and 38,428.56 is: 57,675.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,981.36 : 136,548.72 = 38,428.56 : x
  2. Step 2: Convert to fraction form
    90,981.36/136,548.72 = 38,428.56/x
  3. Step 3: Cross multiply
    90,981.36x = 136,548.72 × 38,428.56
  4. Step 4: Simplify right side
    90,981.36x = 5,247,370,679.44
  5. Step 5: Solve for x
    x = 5,247,370,679.44/90,981.36
  6. Step 6: Final answer
    x = 57,675.23

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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.