Home / 121,979.28-183,178.31-74,871

Finding the Fourth Proportional to 121,979.28, 183,178.31 and 74,871

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Solution

The fourth proportional to 121,979.28, 183,178.31 and 74,871 is: 112,435.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,979.28 : 183,178.31 = 74,871 : x
  2. Step 2: Convert to fraction form
    121,979.28/183,178.31 = 74,871/x
  3. Step 3: Cross multiply
    121,979.28x = 183,178.31 × 74,871
  4. Step 4: Simplify right side
    121,979.28x = 13,714,743,294.80
  5. Step 5: Solve for x
    x = 13,714,743,294.80/121,979.28
  6. Step 6: Final answer
    x = 112,435.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.