Home / 121,929.84-168,259.32-68,215.80

Finding the Fourth Proportional to 121,929.84, 168,259.32 and 68,215.80

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Solution

The fourth proportional to 121,929.84, 168,259.32 and 68,215.80 is: 94,135.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,929.84 : 168,259.32 = 68,215.80 : x
  2. Step 2: Convert to fraction form
    121,929.84/168,259.32 = 68,215.80/x
  3. Step 3: Cross multiply
    121,929.84x = 168,259.32 × 68,215.80
  4. Step 4: Simplify right side
    121,929.84x = 11,477,944,121.26
  5. Step 5: Solve for x
    x = 11,477,944,121.26/121,929.84
  6. Step 6: Final answer
    x = 94,135.64

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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.