Home / 139,428,278.20-209,114,423.70-66,644,918.20

Finding the Fourth Proportional to 139,428,278.20, 209,114,423.70 and 66,644,918.20

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Solution

The fourth proportional to 139,428,278.20, 209,114,423.70 and 66,644,918.20 is: 99,953,996.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,428,278.20 : 209,114,423.70 = 66,644,918.20 : x
  2. Step 2: Convert to fraction form
    139,428,278.20/209,114,423.70 = 66,644,918.20/x
  3. Step 3: Cross multiply
    139,428,278.20x = 209,114,423.70 × 66,644,918.20
  4. Step 4: Simplify right side
    139,428,278.20x = 13,936,413,661,926,642
  5. Step 5: Solve for x
    x = 13,936,413,661,926,642/139,428,278.20
  6. Step 6: Final answer
    x = 99,953,996.72

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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.