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Finding the Fourth Proportional to 165,087.70, 247,631.55 and 40,428.70

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Solution

The fourth proportional to 165,087.70, 247,631.55 and 40,428.70 is: 60,643.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,087.70 : 247,631.55 = 40,428.70 : x
  2. Step 2: Convert to fraction form
    165,087.70/247,631.55 = 40,428.70/x
  3. Step 3: Cross multiply
    165,087.70x = 247,631.55 × 40,428.70
  4. Step 4: Simplify right side
    165,087.70x = 10,011,421,645.49
  5. Step 5: Solve for x
    x = 10,011,421,645.49/165,087.70
  6. Step 6: Final answer
    x = 60,643.05

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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.