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Finding the Fourth Proportional to 98,812.51, 148,112.47 and 42,679.02

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Solution

The fourth proportional to 98,812.51, 148,112.47 and 42,679.02 is: 63,972.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,812.51 : 148,112.47 = 42,679.02 : x
  2. Step 2: Convert to fraction form
    98,812.51/148,112.47 = 42,679.02/x
  3. Step 3: Cross multiply
    98,812.51x = 148,112.47 × 42,679.02
  4. Step 4: Simplify right side
    98,812.51x = 6,321,295,069.38
  5. Step 5: Solve for x
    x = 6,321,295,069.38/98,812.51
  6. Step 6: Final answer
    x = 63,972.62

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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.