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Finding the Fourth Proportional to 210,470.22, 315,721.62 and 70,228.62

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Solution

The fourth proportional to 210,470.22, 315,721.62 and 70,228.62 is: 105,348.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,470.22 : 315,721.62 = 70,228.62 : x
  2. Step 2: Convert to fraction form
    210,470.22/315,721.62 = 70,228.62/x
  3. Step 3: Cross multiply
    210,470.22x = 315,721.62 × 70,228.62
  4. Step 4: Simplify right side
    210,470.22x = 22,172,693,676.76
  5. Step 5: Solve for x
    x = 22,172,693,676.76/210,470.22
  6. Step 6: Final answer
    x = 105,348.37

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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.