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Finding the Fourth Proportional to 78,636.88, 117,899.70 and 25,312.34

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Solution

The fourth proportional to 78,636.88, 117,899.70 and 25,312.34 is: 37,950.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,636.88 : 117,899.70 = 25,312.34 : x
  2. Step 2: Convert to fraction form
    78,636.88/117,899.70 = 25,312.34/x
  3. Step 3: Cross multiply
    78,636.88x = 117,899.70 × 25,312.34
  4. Step 4: Simplify right side
    78,636.88x = 2,984,317,292.30
  5. Step 5: Solve for x
    x = 2,984,317,292.30/78,636.88
  6. Step 6: Final answer
    x = 37,950.61

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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.