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Finding the Fourth Proportional to 102,681.80, 153,792.30 and 84,249.80

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Solution

The fourth proportional to 102,681.80, 153,792.30 and 84,249.80 is: 126,185.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,681.80 : 153,792.30 = 84,249.80 : x
  2. Step 2: Convert to fraction form
    102,681.80/153,792.30 = 84,249.80/x
  3. Step 3: Cross multiply
    102,681.80x = 153,792.30 × 84,249.80
  4. Step 4: Simplify right side
    102,681.80x = 12,956,970,516.54
  5. Step 5: Solve for x
    x = 12,956,970,516.54/102,681.80
  6. Step 6: Final answer
    x = 126,185.66

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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.