Home / 268,205.10-402,307.65-81,216.60

Finding the Fourth Proportional to 268,205.10, 402,307.65 and 81,216.60

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Solution

The fourth proportional to 268,205.10, 402,307.65 and 81,216.60 is: 121,824.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,205.10 : 402,307.65 = 81,216.60 : x
  2. Step 2: Convert to fraction form
    268,205.10/402,307.65 = 81,216.60/x
  3. Step 3: Cross multiply
    268,205.10x = 402,307.65 × 81,216.60
  4. Step 4: Simplify right side
    268,205.10x = 32,674,059,486.99
  5. Step 5: Solve for x
    x = 32,674,059,486.99/268,205.10
  6. Step 6: Final answer
    x = 121,824.90

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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.