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Finding the Fourth Proportional to 138,402,267.70, 207,603,401.55 and 80,864,922.10

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Solution

The fourth proportional to 138,402,267.70, 207,603,401.55 and 80,864,922.10 is: 121,297,383.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,402,267.70 : 207,603,401.55 = 80,864,922.10 : x
  2. Step 2: Convert to fraction form
    138,402,267.70/207,603,401.55 = 80,864,922.10/x
  3. Step 3: Cross multiply
    138,402,267.70x = 207,603,401.55 × 80,864,922.10
  4. Step 4: Simplify right side
    138,402,267.70x = 16,787,832,894,035,768
  5. Step 5: Solve for x
    x = 16,787,832,894,035,768/138,402,267.70
  6. Step 6: Final answer
    x = 121,297,383.15

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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.