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Finding the Fourth Proportional to 139,252.10, 208,829.55 and 72,670.10

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Solution

The fourth proportional to 139,252.10, 208,829.55 and 72,670.10 is: 108,979.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,252.10 : 208,829.55 = 72,670.10 : x
  2. Step 2: Convert to fraction form
    139,252.10/208,829.55 = 72,670.10/x
  3. Step 3: Cross multiply
    139,252.10x = 208,829.55 × 72,670.10
  4. Step 4: Simplify right side
    139,252.10x = 15,175,664,281.46
  5. Step 5: Solve for x
    x = 15,175,664,281.46/139,252.10
  6. Step 6: Final answer
    x = 108,979.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.