Home / 268,210.10-402,315.15-81,221.60

Finding the Fourth Proportional to 268,210.10, 402,315.15 and 81,221.60

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Solution

The fourth proportional to 268,210.10, 402,315.15 and 81,221.60 is: 121,832.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,210.10 : 402,315.15 = 81,221.60 : x
  2. Step 2: Convert to fraction form
    268,210.10/402,315.15 = 81,221.60/x
  3. Step 3: Cross multiply
    268,210.10x = 402,315.15 × 81,221.60
  4. Step 4: Simplify right side
    268,210.10x = 32,676,680,187.24
  5. Step 5: Solve for x
    x = 32,676,680,187.24/268,210.10
  6. Step 6: Final answer
    x = 121,832.40

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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.