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Finding the Fourth Proportional to 312,272.76, 468,422.09 and 90,656.76

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Solution

The fourth proportional to 312,272.76, 468,422.09 and 90,656.76 is: 135,988.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,272.76 : 468,422.09 = 90,656.76 : x
  2. Step 2: Convert to fraction form
    312,272.76/468,422.09 = 90,656.76/x
  3. Step 3: Cross multiply
    312,272.76x = 468,422.09 × 90,656.76
  4. Step 4: Simplify right side
    312,272.76x = 42,465,628,991.83
  5. Step 5: Solve for x
    x = 42,465,628,991.83/312,272.76
  6. Step 6: Final answer
    x = 135,988.90

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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.