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Finding the Fourth Proportional to 121,807.88, 168,095.52 and 68,095.16

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Solution

The fourth proportional to 121,807.88, 168,095.52 and 68,095.16 is: 93,971.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,807.88 : 168,095.52 = 68,095.16 : x
  2. Step 2: Convert to fraction form
    121,807.88/168,095.52 = 68,095.16/x
  3. Step 3: Cross multiply
    121,807.88x = 168,095.52 × 68,095.16
  4. Step 4: Simplify right side
    121,807.88x = 11,446,491,329.68
  5. Step 5: Solve for x
    x = 11,446,491,329.68/121,807.88
  6. Step 6: Final answer
    x = 93,971.68

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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.