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Finding the Fourth Proportional to 312,534.86, 468,815.26 and 90,918.86

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Solution

The fourth proportional to 312,534.86, 468,815.26 and 90,918.86 is: 136,382.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,534.86 : 468,815.26 = 90,918.86 : x
  2. Step 2: Convert to fraction form
    312,534.86/468,815.26 = 90,918.86/x
  3. Step 3: Cross multiply
    312,534.86x = 468,815.26 × 90,918.86
  4. Step 4: Simplify right side
    312,534.86x = 42,624,148,989.80
  5. Step 5: Solve for x
    x = 42,624,148,989.80/312,534.86
  6. Step 6: Final answer
    x = 136,382.06

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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.