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Finding the Fourth Proportional to 78,605.10, 117,833.54 and 39,124.90

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Solution

The fourth proportional to 78,605.10, 117,833.54 and 39,124.90 is: 58,650.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,605.10 : 117,833.54 = 39,124.90 : x
  2. Step 2: Convert to fraction form
    78,605.10/117,833.54 = 39,124.90/x
  3. Step 3: Cross multiply
    78,605.10x = 117,833.54 × 39,124.90
  4. Step 4: Simplify right side
    78,605.10x = 4,610,225,469.15
  5. Step 5: Solve for x
    x = 4,610,225,469.15/78,605.10
  6. Step 6: Final answer
    x = 58,650.46

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1.5x scale

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.