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Finding the Fourth Proportional to 139,021.85, 191,851.52 and 75,359.49

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Solution

The fourth proportional to 139,021.85, 191,851.52 and 75,359.49 is: 103,996.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,021.85 : 191,851.52 = 75,359.49 : x
  2. Step 2: Convert to fraction form
    139,021.85/191,851.52 = 75,359.49/x
  3. Step 3: Cross multiply
    139,021.85x = 191,851.52 × 75,359.49
  4. Step 4: Simplify right side
    139,021.85x = 14,457,832,326.13
  5. Step 5: Solve for x
    x = 14,457,832,326.13/139,021.85
  6. Step 6: Final answer
    x = 103,996.84

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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.