Home / 121,401.10-182,101.65-74,680.30

Finding the Fourth Proportional to 121,401.10, 182,101.65 and 74,680.30

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Solution

The fourth proportional to 121,401.10, 182,101.65 and 74,680.30 is: 112,020.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,401.10 : 182,101.65 = 74,680.30 : x
  2. Step 2: Convert to fraction form
    121,401.10/182,101.65 = 74,680.30/x
  3. Step 3: Cross multiply
    121,401.10x = 182,101.65 × 74,680.30
  4. Step 4: Simplify right side
    121,401.10x = 13,599,405,852.50
  5. Step 5: Solve for x
    x = 13,599,405,852.50/121,401.10
  6. Step 6: Final answer
    x = 112,020.45

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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.