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Finding the Fourth Proportional to 78,600.10, 117,826.03 and 39,119.89

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Solution

The fourth proportional to 78,600.10, 117,826.03 and 39,119.89 is: 58,642.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,600.10 : 117,826.03 = 39,119.89 : x
  2. Step 2: Convert to fraction form
    78,600.10/117,826.03 = 39,119.89/x
  3. Step 3: Cross multiply
    78,600.10x = 117,826.03 × 39,119.89
  4. Step 4: Simplify right side
    78,600.10x = 4,609,341,332.74
  5. Step 5: Solve for x
    x = 4,609,341,332.74/78,600.10
  6. Step 6: Final answer
    x = 58,642.94

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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.