Home / 121,111.20-181,812.60-120,236.40

Finding the Fourth Proportional to 121,111.20, 181,812.60 and 120,236.40

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Solution

The fourth proportional to 121,111.20, 181,812.60 and 120,236.40 is: 180,499.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,111.20 : 181,812.60 = 120,236.40 : x
  2. Step 2: Convert to fraction form
    121,111.20/181,812.60 = 120,236.40/x
  3. Step 3: Cross multiply
    121,111.20x = 181,812.60 × 120,236.40
  4. Step 4: Simplify right side
    121,111.20x = 21,860,492,498.64
  5. Step 5: Solve for x
    x = 21,860,492,498.64/121,111.20
  6. Step 6: Final answer
    x = 180,499.35

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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.