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Finding the Fourth Proportional to 79,488,464.80, 119,085,730.80 and 45,308,279.20

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Solution

The fourth proportional to 79,488,464.80, 119,085,730.80 and 45,308,279.20 is: 67,878,648.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,488,464.80 : 119,085,730.80 = 45,308,279.20 : x
  2. Step 2: Convert to fraction form
    79,488,464.80/119,085,730.80 = 45,308,279.20/x
  3. Step 3: Cross multiply
    79,488,464.80x = 119,085,730.80 × 45,308,279.20
  4. Step 4: Simplify right side
    79,488,464.80x = 5,395,569,539,822,440
  5. Step 5: Solve for x
    x = 5,395,569,539,822,440/79,488,464.80
  6. Step 6: Final answer
    x = 67,878,648.22

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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.