Home / 90,745.92-135,931.62-53,191.95

Finding the Fourth Proportional to 90,745.92, 135,931.62 and 53,191.95

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Solution

The fourth proportional to 90,745.92, 135,931.62 and 53,191.95 is: 79,678.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,745.92 : 135,931.62 = 53,191.95 : x
  2. Step 2: Convert to fraction form
    90,745.92/135,931.62 = 53,191.95/x
  3. Step 3: Cross multiply
    90,745.92x = 135,931.62 × 53,191.95
  4. Step 4: Simplify right side
    90,745.92x = 7,230,467,934.46
  5. Step 5: Solve for x
    x = 7,230,467,934.46/90,745.92
  6. Step 6: Final answer
    x = 79,678.16

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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.