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Finding the Fourth Proportional to 268,200.60, 402,300.90 and 81,212.10

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Solution

The fourth proportional to 268,200.60, 402,300.90 and 81,212.10 is: 121,818.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,200.60 : 402,300.90 = 81,212.10 : x
  2. Step 2: Convert to fraction form
    268,200.60/402,300.90 = 81,212.10/x
  3. Step 3: Cross multiply
    268,200.60x = 402,300.90 × 81,212.10
  4. Step 4: Simplify right side
    268,200.60x = 32,671,700,920.89
  5. Step 5: Solve for x
    x = 32,671,700,920.89/268,200.60
  6. Step 6: Final answer
    x = 121,818.15

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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.