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Finding the Fourth Proportional to 131,990,491.40, 197,985,737.10 and 97,978,267.40

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Solution

The fourth proportional to 131,990,491.40, 197,985,737.10 and 97,978,267.40 is: 146,967,401.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,990,491.40 : 197,985,737.10 = 97,978,267.40 : x
  2. Step 2: Convert to fraction form
    131,990,491.40/197,985,737.10 = 97,978,267.40/x
  3. Step 3: Cross multiply
    131,990,491.40x = 197,985,737.10 × 97,978,267.40
  4. Step 4: Simplify right side
    131,990,491.40x = 19,398,299,490,969,900
  5. Step 5: Solve for x
    x = 19,398,299,490,969,900/131,990,491.40
  6. Step 6: Final answer
    x = 146,967,401.10

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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.