Home / 78,418,007.80-117,627,011.70-74,890,814.20

Finding the Fourth Proportional to 78,418,007.80, 117,627,011.70 and 74,890,814.20

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Solution

The fourth proportional to 78,418,007.80, 117,627,011.70 and 74,890,814.20 is: 112,336,221.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,418,007.80 : 117,627,011.70 = 74,890,814.20 : x
  2. Step 2: Convert to fraction form
    78,418,007.80/117,627,011.70 = 74,890,814.20/x
  3. Step 3: Cross multiply
    78,418,007.80x = 117,627,011.70 × 74,890,814.20
  4. Step 4: Simplify right side
    78,418,007.80x = 8,809,182,678,125,927
  5. Step 5: Solve for x
    x = 8,809,182,678,125,927/78,418,007.80
  6. Step 6: Final answer
    x = 112,336,221.30

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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.