Home / 90,138.56-124,429.51-56,163.83

Finding the Fourth Proportional to 90,138.56, 124,429.51 and 56,163.83

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Solution

The fourth proportional to 90,138.56, 124,429.51 and 56,163.83 is: 77,529.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,138.56 : 124,429.51 = 56,163.83 : x
  2. Step 2: Convert to fraction form
    90,138.56/124,429.51 = 56,163.83/x
  3. Step 3: Cross multiply
    90,138.56x = 124,429.51 × 56,163.83
  4. Step 4: Simplify right side
    90,138.56x = 6,988,437,812.25
  5. Step 5: Solve for x
    x = 6,988,437,812.25/90,138.56
  6. Step 6: Final answer
    x = 77,529.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.