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Finding the Fourth Proportional to 98,608.80, 147,913.20 and 68,428.20

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Solution

The fourth proportional to 98,608.80, 147,913.20 and 68,428.20 is: 102,642.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,608.80 : 147,913.20 = 68,428.20 : x
  2. Step 2: Convert to fraction form
    98,608.80/147,913.20 = 68,428.20/x
  3. Step 3: Cross multiply
    98,608.80x = 147,913.20 × 68,428.20
  4. Step 4: Simplify right side
    98,608.80x = 10,121,434,032.24
  5. Step 5: Solve for x
    x = 10,121,434,032.24/98,608.80
  6. Step 6: Final answer
    x = 102,642.30

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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.