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Finding the Fourth Proportional to 149,780,679.20, 209,976,066.40 and 149,780,679.20

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Solution

The fourth proportional to 149,780,679.20, 209,976,066.40 and 149,780,679.20 is: 209,976,066.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,780,679.20 : 209,976,066.40 = 149,780,679.20 : x
  2. Step 2: Convert to fraction form
    149,780,679.20/209,976,066.40 = 149,780,679.20/x
  3. Step 3: Cross multiply
    149,780,679.20x = 209,976,066.40 × 149,780,679.20
  4. Step 4: Simplify right side
    149,780,679.20x = 31,450,357,841,136,296
  5. Step 5: Solve for x
    x = 31,450,357,841,136,296/149,780,679.20
  6. Step 6: Final answer
    x = 209,976,066.40

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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.