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Finding the Fourth Proportional to 139,968,172.70, 209,952,259.05 and 137,700,691.10

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Solution

The fourth proportional to 139,968,172.70, 209,952,259.05 and 137,700,691.10 is: 206,551,036.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,172.70 : 209,952,259.05 = 137,700,691.10 : x
  2. Step 2: Convert to fraction form
    139,968,172.70/209,952,259.05 = 137,700,691.10/x
  3. Step 3: Cross multiply
    139,968,172.70x = 209,952,259.05 × 137,700,691.10
  4. Step 4: Simplify right side
    139,968,172.70x = 28,910,571,169,191,228
  5. Step 5: Solve for x
    x = 28,910,571,169,191,228/139,968,172.70
  6. Step 6: Final answer
    x = 206,551,036.65

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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.