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Finding the Fourth Proportional to 210,636.48, 315,954.72 and 70,395.11

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Solution

The fourth proportional to 210,636.48, 315,954.72 and 70,395.11 is: 105,592.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,636.48 : 315,954.72 = 70,395.11 : x
  2. Step 2: Convert to fraction form
    210,636.48/315,954.72 = 70,395.11/x
  3. Step 3: Cross multiply
    210,636.48x = 315,954.72 × 70,395.11
  4. Step 4: Simplify right side
    210,636.48x = 22,241,667,269.42
  5. Step 5: Solve for x
    x = 22,241,667,269.42/210,636.48
  6. Step 6: Final answer
    x = 105,592.67

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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.