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Finding the Fourth Proportional to 139,066.88, 191,912.66 and 75,404.68

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Solution

The fourth proportional to 139,066.88, 191,912.66 and 75,404.68 is: 104,058.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,066.88 : 191,912.66 = 75,404.68 : x
  2. Step 2: Convert to fraction form
    139,066.88/191,912.66 = 75,404.68/x
  3. Step 3: Cross multiply
    139,066.88x = 191,912.66 × 75,404.68
  4. Step 4: Simplify right side
    139,066.88x = 14,471,112,715.25
  5. Step 5: Solve for x
    x = 14,471,112,715.25/139,066.88
  6. Step 6: Final answer
    x = 104,058.66

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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.