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Finding the Fourth Proportional to 98,912.56, 136,424.92 and 68,697.92

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Solution

The fourth proportional to 98,912.56, 136,424.92 and 68,697.92 is: 94,751.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,912.56 : 136,424.92 = 68,697.92 : x
  2. Step 2: Convert to fraction form
    98,912.56/136,424.92 = 68,697.92/x
  3. Step 3: Cross multiply
    98,912.56x = 136,424.92 × 68,697.92
  4. Step 4: Simplify right side
    98,912.56x = 9,372,108,240.17
  5. Step 5: Solve for x
    x = 9,372,108,240.17/98,912.56
  6. Step 6: Final answer
    x = 94,751.45

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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.