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Finding the Fourth Proportional to 139,968,205.30, 209,952,307.95 and 79,502,029.30

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Solution

The fourth proportional to 139,968,205.30, 209,952,307.95 and 79,502,029.30 is: 119,253,043.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,205.30 : 209,952,307.95 = 79,502,029.30 : x
  2. Step 2: Convert to fraction form
    139,968,205.30/209,952,307.95 = 79,502,029.30/x
  3. Step 3: Cross multiply
    139,968,205.30x = 209,952,307.95 × 79,502,029.30
  4. Step 4: Simplify right side
    139,968,205.30x = 16,691,634,538,243,522
  5. Step 5: Solve for x
    x = 16,691,634,538,243,522/139,968,205.30
  6. Step 6: Final answer
    x = 119,253,043.95

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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.