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Finding the Fourth Proportional to 98,424.79, 147,499.94 and 74,389.36

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Solution

The fourth proportional to 98,424.79, 147,499.94 and 74,389.36 is: 111,480.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,424.79 : 147,499.94 = 74,389.36 : x
  2. Step 2: Convert to fraction form
    98,424.79/147,499.94 = 74,389.36/x
  3. Step 3: Cross multiply
    98,424.79x = 147,499.94 × 74,389.36
  4. Step 4: Simplify right side
    98,424.79x = 10,972,425,949.07
  5. Step 5: Solve for x
    x = 10,972,425,949.07/98,424.79
  6. Step 6: Final answer
    x = 111,480.31

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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.