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Finding the Fourth Proportional to 71,042.40, 106,750.80 and 39,477.60

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Solution

The fourth proportional to 71,042.40, 106,750.80 and 39,477.60 is: 59,320.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,042.40 : 106,750.80 = 39,477.60 : x
  2. Step 2: Convert to fraction form
    71,042.40/106,750.80 = 39,477.60/x
  3. Step 3: Cross multiply
    71,042.40x = 106,750.80 × 39,477.60
  4. Step 4: Simplify right side
    71,042.40x = 4,214,265,382.08
  5. Step 5: Solve for x
    x = 4,214,265,382.08/71,042.40
  6. Step 6: Final answer
    x = 59,320.43

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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.