Home / 139,428,280.20-209,114,426.70-66,644,920.20

Finding the Fourth Proportional to 139,428,280.20, 209,114,426.70 and 66,644,920.20

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Solution

The fourth proportional to 139,428,280.20, 209,114,426.70 and 66,644,920.20 is: 99,953,999.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,428,280.20 : 209,114,426.70 = 66,644,920.20 : x
  2. Step 2: Convert to fraction form
    139,428,280.20/209,114,426.70 = 66,644,920.20/x
  3. Step 3: Cross multiply
    139,428,280.20x = 209,114,426.70 × 66,644,920.20
  4. Step 4: Simplify right side
    139,428,280.20x = 13,936,414,280,090,250
  5. Step 5: Solve for x
    x = 13,936,414,280,090,250/139,428,280.20
  6. Step 6: Final answer
    x = 99,953,999.72

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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.