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Finding the Fourth Proportional to 210,041.28, 315,057.60 and 69,801.28

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Solution

The fourth proportional to 210,041.28, 315,057.60 and 69,801.28 is: 104,700.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,041.28 : 315,057.60 = 69,801.28 : x
  2. Step 2: Convert to fraction form
    210,041.28/315,057.60 = 69,801.28/x
  3. Step 3: Cross multiply
    210,041.28x = 315,057.60 × 69,801.28
  4. Step 4: Simplify right side
    210,041.28x = 21,991,423,753.73
  5. Step 5: Solve for x
    x = 21,991,423,753.73/210,041.28
  6. Step 6: Final answer
    x = 104,700.48

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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.