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Finding the Fourth Proportional to 98,338.50, 135,718.78 and 55,903.42

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Solution

The fourth proportional to 98,338.50, 135,718.78 and 55,903.42 is: 77,153.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,338.50 : 135,718.78 = 55,903.42 : x
  2. Step 2: Convert to fraction form
    98,338.50/135,718.78 = 55,903.42/x
  3. Step 3: Cross multiply
    98,338.50x = 135,718.78 × 55,903.42
  4. Step 4: Simplify right side
    98,338.50x = 7,587,143,960.23
  5. Step 5: Solve for x
    x = 7,587,143,960.23/98,338.50
  6. Step 6: Final answer
    x = 77,153.34

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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.