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Finding the Fourth Proportional to 210,438.18, 315,531.36 and 98,143.92

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Solution

The fourth proportional to 210,438.18, 315,531.36 and 98,143.92 is: 147,157.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,438.18 : 315,531.36 = 98,143.92 : x
  2. Step 2: Convert to fraction form
    210,438.18/315,531.36 = 98,143.92/x
  3. Step 3: Cross multiply
    210,438.18x = 315,531.36 × 98,143.92
  4. Step 4: Simplify right side
    210,438.18x = 30,967,484,553.33
  5. Step 5: Solve for x
    x = 30,967,484,553.33/210,438.18
  6. Step 6: Final answer
    x = 147,157.16

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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.