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Finding the Fourth Proportional to 139,008.86, 191,832.51 and 75,346.70

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Solution

The fourth proportional to 139,008.86, 191,832.51 and 75,346.70 is: 103,978.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,008.86 : 191,832.51 = 75,346.70 : x
  2. Step 2: Convert to fraction form
    139,008.86/191,832.51 = 75,346.70/x
  3. Step 3: Cross multiply
    139,008.86x = 191,832.51 × 75,346.70
  4. Step 4: Simplify right side
    139,008.86x = 14,453,945,622.05
  5. Step 5: Solve for x
    x = 14,453,945,622.05/139,008.86
  6. Step 6: Final answer
    x = 103,978.60

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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.