Home / 78,639,167.40-117,958,649.58-21,131,439.24

Finding the Fourth Proportional to 78,639,167.40, 117,958,649.58 and 21,131,439.24

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Solution

The fourth proportional to 78,639,167.40, 117,958,649.58 and 21,131,439.24 is: 31,697,131.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,639,167.40 : 117,958,649.58 = 21,131,439.24 : x
  2. Step 2: Convert to fraction form
    78,639,167.40/117,958,649.58 = 21,131,439.24/x
  3. Step 3: Cross multiply
    78,639,167.40x = 117,958,649.58 × 21,131,439.24
  4. Step 4: Simplify right side
    78,639,167.40x = 2,492,636,036,432,221.50
  5. Step 5: Solve for x
    x = 2,492,636,036,432,221.50/78,639,167.40
  6. Step 6: Final answer
    x = 31,697,131.58

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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.