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Finding the Fourth Proportional to 245,988.80, 368,983.20 and 121,572.80

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Solution

The fourth proportional to 245,988.80, 368,983.20 and 121,572.80 is: 182,359.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,988.80 : 368,983.20 = 121,572.80 : x
  2. Step 2: Convert to fraction form
    245,988.80/368,983.20 = 121,572.80/x
  3. Step 3: Cross multiply
    245,988.80x = 368,983.20 × 121,572.80
  4. Step 4: Simplify right side
    245,988.80x = 44,858,320,776.96
  5. Step 5: Solve for x
    x = 44,858,320,776.96/245,988.80
  6. Step 6: Final answer
    x = 182,359.20

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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.