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Finding the Fourth Proportional to 121,788.99, 168,068.36 and 68,074.04

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Solution

The fourth proportional to 121,788.99, 168,068.36 and 68,074.04 is: 93,941.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,788.99 : 168,068.36 = 68,074.04 : x
  2. Step 2: Convert to fraction form
    121,788.99/168,068.36 = 68,074.04/x
  3. Step 3: Cross multiply
    121,788.99x = 168,068.36 × 68,074.04
  4. Step 4: Simplify right side
    121,788.99x = 11,441,091,080.66
  5. Step 5: Solve for x
    x = 11,441,091,080.66/121,788.99
  6. Step 6: Final answer
    x = 93,941.92

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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.