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Finding the Fourth Proportional to 139,967,999.80, 209,951,999.70 and 88,697,721.40

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Solution

The fourth proportional to 139,967,999.80, 209,951,999.70 and 88,697,721.40 is: 133,046,582.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,967,999.80 : 209,951,999.70 = 88,697,721.40 : x
  2. Step 2: Convert to fraction form
    139,967,999.80/209,951,999.70 = 88,697,721.40/x
  3. Step 3: Cross multiply
    139,967,999.80x = 209,951,999.70 × 88,697,721.40
  4. Step 4: Simplify right side
    139,967,999.80x = 18,622,263,976,763,484
  5. Step 5: Solve for x
    x = 18,622,263,976,763,484/139,967,999.80
  6. Step 6: Final answer
    x = 133,046,582.10

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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.