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Finding the Fourth Proportional to 154,428.30, 231,469.65 and 65,666.70

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Solution

The fourth proportional to 154,428.30, 231,469.65 and 65,666.70 is: 98,426.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,428.30 : 231,469.65 = 65,666.70 : x
  2. Step 2: Convert to fraction form
    154,428.30/231,469.65 = 65,666.70/x
  3. Step 3: Cross multiply
    154,428.30x = 231,469.65 × 65,666.70
  4. Step 4: Simplify right side
    154,428.30x = 15,199,848,065.66
  5. Step 5: Solve for x
    x = 15,199,848,065.66/154,428.30
  6. Step 6: Final answer
    x = 98,426.57

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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.