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Finding the Fourth Proportional to 210,479.24, 315,721.56 and 70,237.87

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Solution

The fourth proportional to 210,479.24, 315,721.56 and 70,237.87 is: 105,357.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,479.24 : 315,721.56 = 70,237.87 : x
  2. Step 2: Convert to fraction form
    210,479.24/315,721.56 = 70,237.87/x
  3. Step 3: Cross multiply
    210,479.24x = 315,721.56 × 70,237.87
  4. Step 4: Simplify right side
    210,479.24x = 22,175,609,361.57
  5. Step 5: Solve for x
    x = 22,175,609,361.57/210,479.24
  6. Step 6: Final answer
    x = 105,357.70

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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.