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Finding the Fourth Proportional to 71,328.80, 106,890.80 and 52,461.60

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Solution

The fourth proportional to 71,328.80, 106,890.80 and 52,461.60 is: 78,617.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,328.80 : 106,890.80 = 52,461.60 : x
  2. Step 2: Convert to fraction form
    71,328.80/106,890.80 = 52,461.60/x
  3. Step 3: Cross multiply
    71,328.80x = 106,890.80 × 52,461.60
  4. Step 4: Simplify right side
    71,328.80x = 5,607,662,393.28
  5. Step 5: Solve for x
    x = 5,607,662,393.28/71,328.80
  6. Step 6: Final answer
    x = 78,617.09

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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.