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Finding the Fourth Proportional to 78,868.80, 118,108.80 and 52,430.40

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Solution

The fourth proportional to 78,868.80, 118,108.80 and 52,430.40 is: 78,516.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,868.80 : 118,108.80 = 52,430.40 : x
  2. Step 2: Convert to fraction form
    78,868.80/118,108.80 = 52,430.40/x
  3. Step 3: Cross multiply
    78,868.80x = 118,108.80 × 52,430.40
  4. Step 4: Simplify right side
    78,868.80x = 6,192,491,627.52
  5. Step 5: Solve for x
    x = 6,192,491,627.52/78,868.80
  6. Step 6: Final answer
    x = 78,516.37

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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.