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Finding the Fourth Proportional to 139,968,368.70, 209,952,553.05 and 139,118,063.10

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Solution

The fourth proportional to 139,968,368.70, 209,952,553.05 and 139,118,063.10 is: 208,677,094.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,368.70 : 209,952,553.05 = 139,118,063.10 : x
  2. Step 2: Convert to fraction form
    139,968,368.70/209,952,553.05 = 139,118,063.10/x
  3. Step 3: Cross multiply
    139,968,368.70x = 209,952,553.05 × 139,118,063.10
  4. Step 4: Simplify right side
    139,968,368.70x = 29,208,192,523,215,996
  5. Step 5: Solve for x
    x = 29,208,192,523,215,996/139,968,368.70
  6. Step 6: Final answer
    x = 208,677,094.65

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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.