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Finding the Fourth Proportional to 297,118.76, 445,634.30 and 86,700.20

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Solution

The fourth proportional to 297,118.76, 445,634.30 and 86,700.20 is: 130,037.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,118.76 : 445,634.30 = 86,700.20 : x
  2. Step 2: Convert to fraction form
    297,118.76/445,634.30 = 86,700.20/x
  3. Step 3: Cross multiply
    297,118.76x = 445,634.30 × 86,700.20
  4. Step 4: Simplify right side
    297,118.76x = 38,636,582,936.86
  5. Step 5: Solve for x
    x = 38,636,582,936.86/297,118.76
  6. Step 6: Final answer
    x = 130,037.51

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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.