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Finding the Fourth Proportional to 198,420.50, 297,663.59 and 91,910.90

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Solution

The fourth proportional to 198,420.50, 297,663.59 and 91,910.90 is: 137,881.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,420.50 : 297,663.59 = 91,910.90 : x
  2. Step 2: Convert to fraction form
    198,420.50/297,663.59 = 91,910.90/x
  3. Step 3: Cross multiply
    198,420.50x = 297,663.59 × 91,910.90
  4. Step 4: Simplify right side
    198,420.50x = 27,358,529,428.07
  5. Step 5: Solve for x
    x = 27,358,529,428.07/198,420.50
  6. Step 6: Final answer
    x = 137,881.57

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1.5x scale

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.