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Finding the Fourth Proportional to 139,511.10, 209,266.65 and 127,263.90

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Solution

The fourth proportional to 139,511.10, 209,266.65 and 127,263.90 is: 190,895.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,511.10 : 209,266.65 = 127,263.90 : x
  2. Step 2: Convert to fraction form
    139,511.10/209,266.65 = 127,263.90/x
  3. Step 3: Cross multiply
    139,511.10x = 209,266.65 × 127,263.90
  4. Step 4: Simplify right side
    139,511.10x = 26,632,090,018.94
  5. Step 5: Solve for x
    x = 26,632,090,018.94/139,511.10
  6. Step 6: Final answer
    x = 190,895.85

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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.