Home / 90,406.60-135,511.38-77,218.96

Finding the Fourth Proportional to 90,406.60, 135,511.38 and 77,218.96

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Solution

The fourth proportional to 90,406.60, 135,511.38 and 77,218.96 is: 115,744.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,406.60 : 135,511.38 = 77,218.96 : x
  2. Step 2: Convert to fraction form
    90,406.60/135,511.38 = 77,218.96/x
  3. Step 3: Cross multiply
    90,406.60x = 135,511.38 × 77,218.96
  4. Step 4: Simplify right side
    90,406.60x = 10,464,047,831.76
  5. Step 5: Solve for x
    x = 10,464,047,831.76/90,406.60
  6. Step 6: Final answer
    x = 115,744.29

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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.