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Finding the Fourth Proportional to 210,217.36, 315,129.12 and 69,943.36

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Solution

The fourth proportional to 210,217.36, 315,129.12 and 69,943.36 is: 104,849.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,217.36 : 315,129.12 = 69,943.36 : x
  2. Step 2: Convert to fraction form
    210,217.36/315,129.12 = 69,943.36/x
  3. Step 3: Cross multiply
    210,217.36x = 315,129.12 × 69,943.36
  4. Step 4: Simplify right side
    210,217.36x = 22,041,189,486.64
  5. Step 5: Solve for x
    x = 22,041,189,486.64/210,217.36
  6. Step 6: Final answer
    x = 104,849.52

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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.