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Finding the Fourth Proportional to 78,695.70, 118,043.55 and 63,143.70

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Solution

The fourth proportional to 78,695.70, 118,043.55 and 63,143.70 is: 94,715.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,695.70 : 118,043.55 = 63,143.70 : x
  2. Step 2: Convert to fraction form
    78,695.70/118,043.55 = 63,143.70/x
  3. Step 3: Cross multiply
    78,695.70x = 118,043.55 × 63,143.70
  4. Step 4: Simplify right side
    78,695.70x = 7,453,706,508.14
  5. Step 5: Solve for x
    x = 7,453,706,508.14/78,695.70
  6. Step 6: Final answer
    x = 94,715.55

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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.