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Finding the Fourth Proportional to 136,484.92, 188,389.74 and 86,217.40

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Solution

The fourth proportional to 136,484.92, 188,389.74 and 86,217.40 is: 119,005.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,484.92 : 188,389.74 = 86,217.40 : x
  2. Step 2: Convert to fraction form
    136,484.92/188,389.74 = 86,217.40/x
  3. Step 3: Cross multiply
    136,484.92x = 188,389.74 × 86,217.40
  4. Step 4: Simplify right side
    136,484.92x = 16,242,473,569.48
  5. Step 5: Solve for x
    x = 16,242,473,569.48/136,484.92
  6. Step 6: Final answer
    x = 119,005.63

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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.