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Finding the Fourth Proportional to 92,678.87, 128,001.87 and 62,411.54

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Solution

The fourth proportional to 92,678.87, 128,001.87 and 62,411.54 is: 86,198.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,678.87 : 128,001.87 = 62,411.54 : x
  2. Step 2: Convert to fraction form
    92,678.87/128,001.87 = 62,411.54/x
  3. Step 3: Cross multiply
    92,678.87x = 128,001.87 × 62,411.54
  4. Step 4: Simplify right side
    92,678.87x = 7,988,793,189.57
  5. Step 5: Solve for x
    x = 7,988,793,189.57/92,678.87
  6. Step 6: Final answer
    x = 86,198.64

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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.