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Finding the Fourth Proportional to 78,370.67, 108,184.61 and 52,911.50

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Solution

The fourth proportional to 78,370.67, 108,184.61 and 52,911.50 is: 73,040.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,370.67 : 108,184.61 = 52,911.50 : x
  2. Step 2: Convert to fraction form
    78,370.67/108,184.61 = 52,911.50/x
  3. Step 3: Cross multiply
    78,370.67x = 108,184.61 × 52,911.50
  4. Step 4: Simplify right side
    78,370.67x = 5,724,210,394.76
  5. Step 5: Solve for x
    x = 5,724,210,394.76/78,370.67
  6. Step 6: Final answer
    x = 73,040.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.