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Finding the Fourth Proportional to 78,894.95, 118,401.20 and 57,889.27

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Solution

The fourth proportional to 78,894.95, 118,401.20 and 57,889.27 is: 86,877.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,894.95 : 118,401.20 = 57,889.27 : x
  2. Step 2: Convert to fraction form
    78,894.95/118,401.20 = 57,889.27/x
  3. Step 3: Cross multiply
    78,894.95x = 118,401.20 × 57,889.27
  4. Step 4: Simplify right side
    78,894.95x = 6,854,159,436.39
  5. Step 5: Solve for x
    x = 6,854,159,436.39/78,894.95
  6. Step 6: Final answer
    x = 86,877.04

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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.