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Finding the Fourth Proportional to 139,138.79, 192,010.55 and 75,476.66

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Solution

The fourth proportional to 139,138.79, 192,010.55 and 75,476.66 is: 104,157.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,138.79 : 192,010.55 = 75,476.66 : x
  2. Step 2: Convert to fraction form
    139,138.79/192,010.55 = 75,476.66/x
  3. Step 3: Cross multiply
    139,138.79x = 192,010.55 × 75,476.66
  4. Step 4: Simplify right side
    139,138.79x = 14,492,313,661.33
  5. Step 5: Solve for x
    x = 14,492,313,661.33/139,138.79
  6. Step 6: Final answer
    x = 104,157.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.