Home / 121,830.54-168,127.17-67,381.80

Finding the Fourth Proportional to 121,830.54, 168,127.17 and 67,381.80

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Solution

The fourth proportional to 121,830.54, 168,127.17 and 67,381.80 is: 92,987.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,830.54 : 168,127.17 = 67,381.80 : x
  2. Step 2: Convert to fraction form
    121,830.54/168,127.17 = 67,381.80/x
  3. Step 3: Cross multiply
    121,830.54x = 168,127.17 × 67,381.80
  4. Step 4: Simplify right side
    121,830.54x = 11,328,711,343.51
  5. Step 5: Solve for x
    x = 11,328,711,343.51/121,830.54
  6. Step 6: Final answer
    x = 92,987.45

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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.