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Finding the Fourth Proportional to 128,169.65, 192,281.74 and 43,907.20

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Solution

The fourth proportional to 128,169.65, 192,281.74 and 43,907.20 is: 65,870.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,169.65 : 192,281.74 = 43,907.20 : x
  2. Step 2: Convert to fraction form
    128,169.65/192,281.74 = 43,907.20/x
  3. Step 3: Cross multiply
    128,169.65x = 192,281.74 × 43,907.20
  4. Step 4: Simplify right side
    128,169.65x = 8,442,552,224.06
  5. Step 5: Solve for x
    x = 8,442,552,224.06/128,169.65
  6. Step 6: Final answer
    x = 65,870.13

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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.