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Finding the Fourth Proportional to 192,653.55, 288,980.33 and 139,509.45

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Solution

The fourth proportional to 192,653.55, 288,980.33 and 139,509.45 is: 209,264.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,653.55 : 288,980.33 = 139,509.45 : x
  2. Step 2: Convert to fraction form
    192,653.55/288,980.33 = 139,509.45/x
  3. Step 3: Cross multiply
    192,653.55x = 288,980.33 × 139,509.45
  4. Step 4: Simplify right side
    192,653.55x = 40,315,486,201.57
  5. Step 5: Solve for x
    x = 40,315,486,201.57/192,653.55
  6. Step 6: Final answer
    x = 209,264.18

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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.