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Finding the Fourth Proportional to 98,349.09, 135,721.12 and 55,907.62

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Solution

The fourth proportional to 98,349.09, 135,721.12 and 55,907.62 is: 77,152.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,349.09 : 135,721.12 = 55,907.62 : x
  2. Step 2: Convert to fraction form
    98,349.09/135,721.12 = 55,907.62/x
  3. Step 3: Cross multiply
    98,349.09x = 135,721.12 × 55,907.62
  4. Step 4: Simplify right side
    98,349.09x = 7,587,844,428.69
  5. Step 5: Solve for x
    x = 7,587,844,428.69/98,349.09
  6. Step 6: Final answer
    x = 77,152.16

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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.