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Finding the Fourth Proportional to 245,469, 368,207.98 and 76,985.56

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Solution

The fourth proportional to 245,469, 368,207.98 and 76,985.56 is: 115,479.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,469 : 368,207.98 = 76,985.56 : x
  2. Step 2: Convert to fraction form
    245,469/368,207.98 = 76,985.56/x
  3. Step 3: Cross multiply
    245,469x = 368,207.98 × 76,985.56
  4. Step 4: Simplify right side
    245,469x = 28,346,697,536.77
  5. Step 5: Solve for x
    x = 28,346,697,536.77/245,469
  6. Step 6: Final answer
    x = 115,479.75

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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.