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Finding the Fourth Proportional to 128,698.34, 192,998.91 and 62,116.34

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Solution

The fourth proportional to 128,698.34, 192,998.91 and 62,116.34 is: 93,151.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,698.34 : 192,998.91 = 62,116.34 : x
  2. Step 2: Convert to fraction form
    128,698.34/192,998.91 = 62,116.34/x
  3. Step 3: Cross multiply
    128,698.34x = 192,998.91 × 62,116.34
  4. Step 4: Simplify right side
    128,698.34x = 11,988,385,913.19
  5. Step 5: Solve for x
    x = 11,988,385,913.19/128,698.34
  6. Step 6: Final answer
    x = 93,151.05

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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.