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Finding the Fourth Proportional to 217,220.48, 299,910.72 and 135,673.28

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Solution

The fourth proportional to 217,220.48, 299,910.72 and 135,673.28 is: 187,320.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,220.48 : 299,910.72 = 135,673.28 : x
  2. Step 2: Convert to fraction form
    217,220.48/299,910.72 = 135,673.28/x
  3. Step 3: Cross multiply
    217,220.48x = 299,910.72 × 135,673.28
  4. Step 4: Simplify right side
    217,220.48x = 40,689,871,089.56
  5. Step 5: Solve for x
    x = 40,689,871,089.56/217,220.48
  6. Step 6: Final answer
    x = 187,320.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.