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Finding the Fourth Proportional to 139,038.39, 191,867.81 and 75,374.82

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Solution

The fourth proportional to 139,038.39, 191,867.81 and 75,374.82 is: 104,014.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,038.39 : 191,867.81 = 75,374.82 : x
  2. Step 2: Convert to fraction form
    139,038.39/191,867.81 = 75,374.82/x
  3. Step 3: Cross multiply
    139,038.39x = 191,867.81 × 75,374.82
  4. Step 4: Simplify right side
    139,038.39x = 14,462,001,265.67
  5. Step 5: Solve for x
    x = 14,462,001,265.67/139,038.39
  6. Step 6: Final answer
    x = 104,014.45

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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.