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Finding the Fourth Proportional to 98,425.79, 147,501.43 and 74,390.36

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Solution

The fourth proportional to 98,425.79, 147,501.43 and 74,390.36 is: 111,481.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,425.79 : 147,501.43 = 74,390.36 : x
  2. Step 2: Convert to fraction form
    98,425.79/147,501.43 = 74,390.36/x
  3. Step 3: Cross multiply
    98,425.79x = 147,501.43 × 74,390.36
  4. Step 4: Simplify right side
    98,425.79x = 10,972,684,478.21
  5. Step 5: Solve for x
    x = 10,972,684,478.21/98,425.79
  6. Step 6: Final answer
    x = 111,481.80

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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.