Home / 121,838.08-168,128.76-68,127.52

Finding the Fourth Proportional to 121,838.08, 168,128.76 and 68,127.52

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Solution

The fourth proportional to 121,838.08, 168,128.76 and 68,127.52 is: 94,011.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,838.08 : 168,128.76 = 68,127.52 : x
  2. Step 2: Convert to fraction form
    121,838.08/168,128.76 = 68,127.52/x
  3. Step 3: Cross multiply
    121,838.08x = 168,128.76 × 68,127.52
  4. Step 4: Simplify right side
    121,838.08x = 11,454,195,459.48
  5. Step 5: Solve for x
    x = 11,454,195,459.48/121,838.08
  6. Step 6: Final answer
    x = 94,011.62

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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.