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Finding the Fourth Proportional to 137,642,709.60, 206,464,064.40 and 79,449,920.10

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Solution

The fourth proportional to 137,642,709.60, 206,464,064.40 and 79,449,920.10 is: 119,174,880.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,642,709.60 : 206,464,064.40 = 79,449,920.10 : x
  2. Step 2: Convert to fraction form
    137,642,709.60/206,464,064.40 = 79,449,920.10/x
  3. Step 3: Cross multiply
    137,642,709.60x = 206,464,064.40 × 79,449,920.10
  4. Step 4: Simplify right side
    137,642,709.60x = 16,403,553,420,101,254
  5. Step 5: Solve for x
    x = 16,403,553,420,101,254/137,642,709.60
  6. Step 6: Final answer
    x = 119,174,880.15

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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.