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Finding the Fourth Proportional to 139,124.08, 191,839.08 and 103,380.40

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Solution

The fourth proportional to 139,124.08, 191,839.08 and 103,380.40 is: 142,551.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,124.08 : 191,839.08 = 103,380.40 : x
  2. Step 2: Convert to fraction form
    139,124.08/191,839.08 = 103,380.40/x
  3. Step 3: Cross multiply
    139,124.08x = 191,839.08 × 103,380.40
  4. Step 4: Simplify right side
    139,124.08x = 19,832,400,826.03
  5. Step 5: Solve for x
    x = 19,832,400,826.03/139,124.08
  6. Step 6: Final answer
    x = 142,551.89

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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.