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Finding the Fourth Proportional to 139,447.66, 209,139.12 and 68,299.32

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Solution

The fourth proportional to 139,447.66, 209,139.12 and 68,299.32 is: 102,433.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,447.66 : 209,139.12 = 68,299.32 : x
  2. Step 2: Convert to fraction form
    139,447.66/209,139.12 = 68,299.32/x
  3. Step 3: Cross multiply
    139,447.66x = 209,139.12 × 68,299.32
  4. Step 4: Simplify right side
    139,447.66x = 14,284,059,681.40
  5. Step 5: Solve for x
    x = 14,284,059,681.40/139,447.66
  6. Step 6: Final answer
    x = 102,433.13

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1.5x scale

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.