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Finding the Fourth Proportional to 245,712.80, 368,569.20 and 121,296.80

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Solution

The fourth proportional to 245,712.80, 368,569.20 and 121,296.80 is: 181,945.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,712.80 : 368,569.20 = 121,296.80 : x
  2. Step 2: Convert to fraction form
    245,712.80/368,569.20 = 121,296.80/x
  3. Step 3: Cross multiply
    245,712.80x = 368,569.20 × 121,296.80
  4. Step 4: Simplify right side
    245,712.80x = 44,706,264,538.56
  5. Step 5: Solve for x
    x = 44,706,264,538.56/245,712.80
  6. Step 6: Final answer
    x = 181,945.20

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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.