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Finding the Fourth Proportional to 245,986.80, 368,980.20 and 121,570.80

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Solution

The fourth proportional to 245,986.80, 368,980.20 and 121,570.80 is: 182,356.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,986.80 : 368,980.20 = 121,570.80 : x
  2. Step 2: Convert to fraction form
    245,986.80/368,980.20 = 121,570.80/x
  3. Step 3: Cross multiply
    245,986.80x = 368,980.20 × 121,570.80
  4. Step 4: Simplify right side
    245,986.80x = 44,857,218,098.16
  5. Step 5: Solve for x
    x = 44,857,218,098.16/245,986.80
  6. Step 6: Final answer
    x = 182,356.20

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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.