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Finding the Fourth Proportional to 120,145,102.70, 168,585,781.30 and 120,145,102.70

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Solution

The fourth proportional to 120,145,102.70, 168,585,781.30 and 120,145,102.70 is: 168,585,781.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,145,102.70 : 168,585,781.30 = 120,145,102.70 : x
  2. Step 2: Convert to fraction form
    120,145,102.70/168,585,781.30 = 120,145,102.70/x
  3. Step 3: Cross multiply
    120,145,102.70x = 168,585,781.30 × 120,145,102.70
  4. Step 4: Simplify right side
    120,145,102.70x = 20,254,756,008,048,240
  5. Step 5: Solve for x
    x = 20,254,756,008,048,240/120,145,102.70
  6. Step 6: Final answer
    x = 168,585,781.30

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.