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Finding the Fourth Proportional to 139,287.74, 192,220.98 and 75,629.66

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Solution

The fourth proportional to 139,287.74, 192,220.98 and 75,629.66 is: 104,371.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,287.74 : 192,220.98 = 75,629.66 : x
  2. Step 2: Convert to fraction form
    139,287.74/192,220.98 = 75,629.66/x
  3. Step 3: Cross multiply
    139,287.74x = 192,220.98 × 75,629.66
  4. Step 4: Simplify right side
    139,287.74x = 14,537,607,362.27
  5. Step 5: Solve for x
    x = 14,537,607,362.27/139,287.74
  6. Step 6: Final answer
    x = 104,371.05

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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.