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Finding the Fourth Proportional to 139,275.18, 192,201.86 and 75,612.98

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Solution

The fourth proportional to 139,275.18, 192,201.86 and 75,612.98 is: 104,347.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,275.18 : 192,201.86 = 75,612.98 : x
  2. Step 2: Convert to fraction form
    139,275.18/192,201.86 = 75,612.98/x
  3. Step 3: Cross multiply
    139,275.18x = 192,201.86 × 75,612.98
  4. Step 4: Simplify right side
    139,275.18x = 14,532,954,984.54
  5. Step 5: Solve for x
    x = 14,532,954,984.54/139,275.18
  6. Step 6: Final answer
    x = 104,347.06

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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.