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Finding the Fourth Proportional to 210,993.18, 316,424.16 and 70,719

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Solution

The fourth proportional to 210,993.18, 316,424.16 and 70,719 is: 106,056.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,993.18 : 316,424.16 = 70,719 : x
  2. Step 2: Convert to fraction form
    210,993.18/316,424.16 = 70,719/x
  3. Step 3: Cross multiply
    210,993.18x = 316,424.16 × 70,719
  4. Step 4: Simplify right side
    210,993.18x = 22,377,200,171.04
  5. Step 5: Solve for x
    x = 22,377,200,171.04/210,993.18
  6. Step 6: Final answer
    x = 106,056.51

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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.