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Finding the Fourth Proportional to 296,965.80, 445,448.68 and 86,603.72

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Solution

The fourth proportional to 296,965.80, 445,448.68 and 86,603.72 is: 129,905.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,965.80 : 445,448.68 = 86,603.72 : x
  2. Step 2: Convert to fraction form
    296,965.80/445,448.68 = 86,603.72/x
  3. Step 3: Cross multiply
    296,965.80x = 445,448.68 × 86,603.72
  4. Step 4: Simplify right side
    296,965.80x = 38,577,512,757.09
  5. Step 5: Solve for x
    x = 38,577,512,757.09/296,965.80
  6. Step 6: Final answer
    x = 129,905.57

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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.