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Finding the Fourth Proportional to 312,591.99, 468,838.88 and 99,331.82

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Solution

The fourth proportional to 312,591.99, 468,838.88 and 99,331.82 is: 148,982.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,591.99 : 468,838.88 = 99,331.82 : x
  2. Step 2: Convert to fraction form
    312,591.99/468,838.88 = 99,331.82/x
  3. Step 3: Cross multiply
    312,591.99x = 468,838.88 × 99,331.82
  4. Step 4: Simplify right side
    312,591.99x = 46,570,619,085.69
  5. Step 5: Solve for x
    x = 46,570,619,085.69/312,591.99
  6. Step 6: Final answer
    x = 148,982.13

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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.