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Finding the Fourth Proportional to 212,187.54, 318,320.66 and 70,042.71

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Solution

The fourth proportional to 212,187.54, 318,320.66 and 70,042.71 is: 105,077.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,187.54 : 318,320.66 = 70,042.71 : x
  2. Step 2: Convert to fraction form
    212,187.54/318,320.66 = 70,042.71/x
  3. Step 3: Cross multiply
    212,187.54x = 318,320.66 × 70,042.71
  4. Step 4: Simplify right side
    212,187.54x = 22,296,042,399.56
  5. Step 5: Solve for x
    x = 22,296,042,399.56/212,187.54
  6. Step 6: Final answer
    x = 105,077.06

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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.