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Finding the Fourth Proportional to 139,008.98, 191,832.58 and 75,346.76

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Solution

The fourth proportional to 139,008.98, 191,832.58 and 75,346.76 is: 103,978.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,008.98 : 191,832.58 = 75,346.76 : x
  2. Step 2: Convert to fraction form
    139,008.98/191,832.58 = 75,346.76/x
  3. Step 3: Cross multiply
    139,008.98x = 191,832.58 × 75,346.76
  4. Step 4: Simplify right side
    139,008.98x = 14,453,962,217.91
  5. Step 5: Solve for x
    x = 14,453,962,217.91/139,008.98
  6. Step 6: Final answer
    x = 103,978.63

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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.