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Finding the Fourth Proportional to 139,800.90, 209,646.68 and 51,008.70

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Solution

The fourth proportional to 139,800.90, 209,646.68 and 51,008.70 is: 76,493.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,800.90 : 209,646.68 = 51,008.70 : x
  2. Step 2: Convert to fraction form
    139,800.90/209,646.68 = 51,008.70/x
  3. Step 3: Cross multiply
    139,800.90x = 209,646.68 × 51,008.70
  4. Step 4: Simplify right side
    139,800.90x = 10,693,804,351.07
  5. Step 5: Solve for x
    x = 10,693,804,351.07/139,800.90
  6. Step 6: Final answer
    x = 76,493.10

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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.