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Finding the Fourth Proportional to 98,858, 136,424.04 and 54,146.96

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Solution

The fourth proportional to 98,858, 136,424.04 and 54,146.96 is: 74,722.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,858 : 136,424.04 = 54,146.96 : x
  2. Step 2: Convert to fraction form
    98,858/136,424.04 = 54,146.96/x
  3. Step 3: Cross multiply
    98,858x = 136,424.04 × 54,146.96
  4. Step 4: Simplify right side
    98,858x = 7,386,947,036.92
  5. Step 5: Solve for x
    x = 7,386,947,036.92/98,858
  6. Step 6: Final answer
    x = 74,722.80

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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.