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Finding the Fourth Proportional to 79,686,643.20, 119,529,964.80 and 79,686,643.20

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Solution

The fourth proportional to 79,686,643.20, 119,529,964.80 and 79,686,643.20 is: 119,529,964.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,686,643.20 : 119,529,964.80 = 79,686,643.20 : x
  2. Step 2: Convert to fraction form
    79,686,643.20/119,529,964.80 = 79,686,643.20/x
  3. Step 3: Cross multiply
    79,686,643.20x = 119,529,964.80 × 79,686,643.20
  4. Step 4: Simplify right side
    79,686,643.20x = 9,524,941,656,726,160
  5. Step 5: Solve for x
    x = 9,524,941,656,726,160/79,686,643.20
  6. Step 6: Final answer
    x = 119,529,964.80

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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.