Home / 121,815.12-168,108.57-68,102.40

Finding the Fourth Proportional to 121,815.12, 168,108.57 and 68,102.40

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Solution

The fourth proportional to 121,815.12, 168,108.57 and 68,102.40 is: 93,983.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,815.12 : 168,108.57 = 68,102.40 : x
  2. Step 2: Convert to fraction form
    121,815.12/168,108.57 = 68,102.40/x
  3. Step 3: Cross multiply
    121,815.12x = 168,108.57 × 68,102.40
  4. Step 4: Simplify right side
    121,815.12x = 11,448,597,077.57
  5. Step 5: Solve for x
    x = 11,448,597,077.57/121,815.12
  6. Step 6: Final answer
    x = 93,983.38

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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.