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Finding the Fourth Proportional to 79,488,456.80, 119,085,718.80 and 45,308,271.20

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Solution

The fourth proportional to 79,488,456.80, 119,085,718.80 and 45,308,271.20 is: 67,878,636.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,488,456.80 : 119,085,718.80 = 45,308,271.20 : x
  2. Step 2: Convert to fraction form
    79,488,456.80/119,085,718.80 = 45,308,271.20/x
  3. Step 3: Cross multiply
    79,488,456.80x = 119,085,718.80 × 45,308,271.20
  4. Step 4: Simplify right side
    79,488,456.80x = 5,395,568,043,437,339
  5. Step 5: Solve for x
    x = 5,395,568,043,437,339/79,488,456.80
  6. Step 6: Final answer
    x = 67,878,636.23

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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.