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Finding the Fourth Proportional to 78,310.88, 117,307.44 and 62,542.40

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Solution

The fourth proportional to 78,310.88, 117,307.44 and 62,542.40 is: 93,686.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,310.88 : 117,307.44 = 62,542.40 : x
  2. Step 2: Convert to fraction form
    78,310.88/117,307.44 = 62,542.40/x
  3. Step 3: Cross multiply
    78,310.88x = 117,307.44 × 62,542.40
  4. Step 4: Simplify right side
    78,310.88x = 7,336,688,835.46
  5. Step 5: Solve for x
    x = 7,336,688,835.46/78,310.88
  6. Step 6: Final answer
    x = 93,686.71

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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.