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Finding the Fourth Proportional to 98,174.93, 135,479.45 and 57,890.39

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Solution

The fourth proportional to 98,174.93, 135,479.45 and 57,890.39 is: 79,887.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,174.93 : 135,479.45 = 57,890.39 : x
  2. Step 2: Convert to fraction form
    98,174.93/135,479.45 = 57,890.39/x
  3. Step 3: Cross multiply
    98,174.93x = 135,479.45 × 57,890.39
  4. Step 4: Simplify right side
    98,174.93x = 7,842,957,664.81
  5. Step 5: Solve for x
    x = 7,842,957,664.81/98,174.93
  6. Step 6: Final answer
    x = 79,887.58

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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.