Home / 90,981.11-136,496.37-51,565.90

Finding the Fourth Proportional to 90,981.11, 136,496.37 and 51,565.90

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Solution

The fourth proportional to 90,981.11, 136,496.37 and 51,565.90 is: 77,362.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,981.11 : 136,496.37 = 51,565.90 : x
  2. Step 2: Convert to fraction form
    90,981.11/136,496.37 = 51,565.90/x
  3. Step 3: Cross multiply
    90,981.11x = 136,496.37 × 51,565.90
  4. Step 4: Simplify right side
    90,981.11x = 7,038,558,165.78
  5. Step 5: Solve for x
    x = 7,038,558,165.78/90,981.11
  6. Step 6: Final answer
    x = 77,362.85

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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.