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Finding the Fourth Proportional to 79,487,920.20, 119,231,880.30 and 78,984,035.40

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Solution

The fourth proportional to 79,487,920.20, 119,231,880.30 and 78,984,035.40 is: 118,476,053.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,487,920.20 : 119,231,880.30 = 78,984,035.40 : x
  2. Step 2: Convert to fraction form
    79,487,920.20/119,231,880.30 = 78,984,035.40/x
  3. Step 3: Cross multiply
    79,487,920.20x = 119,231,880.30 × 78,984,035.40
  4. Step 4: Simplify right side
    79,487,920.20x = 9,417,415,054,423,764
  5. Step 5: Solve for x
    x = 9,417,415,054,423,764/79,487,920.20
  6. Step 6: Final answer
    x = 118,476,053.10

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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.