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Finding the Fourth Proportional to 121,813.64, 168,104.08 and 68,101.64

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Solution

The fourth proportional to 121,813.64, 168,104.08 and 68,101.64 is: 93,980.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,813.64 : 168,104.08 = 68,101.64 : x
  2. Step 2: Convert to fraction form
    121,813.64/168,104.08 = 68,101.64/x
  3. Step 3: Cross multiply
    121,813.64x = 168,104.08 × 68,101.64
  4. Step 4: Simplify right side
    121,813.64x = 11,448,163,538.69
  5. Step 5: Solve for x
    x = 11,448,163,538.69/121,813.64
  6. Step 6: Final answer
    x = 93,980.97

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1.5x scale

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.