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Finding the Fourth Proportional to 139,029.48, 191,860.38 and 75,367.80

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Solution

The fourth proportional to 139,029.48, 191,860.38 and 75,367.80 is: 104,007.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,029.48 : 191,860.38 = 75,367.80 : x
  2. Step 2: Convert to fraction form
    139,029.48/191,860.38 = 75,367.80/x
  3. Step 3: Cross multiply
    139,029.48x = 191,860.38 × 75,367.80
  4. Step 4: Simplify right side
    139,029.48x = 14,460,094,747.76
  5. Step 5: Solve for x
    x = 14,460,094,747.76/139,029.48
  6. Step 6: Final answer
    x = 104,007.40

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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.