Home / 78,272.71-117,408.65-19,108.69

Finding the Fourth Proportional to 78,272.71, 117,408.65 and 19,108.69

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Solution

The fourth proportional to 78,272.71, 117,408.65 and 19,108.69 is: 28,662.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,272.71 : 117,408.65 = 19,108.69 : x
  2. Step 2: Convert to fraction form
    78,272.71/117,408.65 = 19,108.69/x
  3. Step 3: Cross multiply
    78,272.71x = 117,408.65 × 19,108.69
  4. Step 4: Simplify right side
    78,272.71x = 2,243,525,496.17
  5. Step 5: Solve for x
    x = 2,243,525,496.17/78,272.71
  6. Step 6: Final answer
    x = 28,662.93

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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.