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Finding the Fourth Proportional to 71,370.80, 107,056.20 and 64,809.80

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Solution

The fourth proportional to 71,370.80, 107,056.20 and 64,809.80 is: 97,214.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,370.80 : 107,056.20 = 64,809.80 : x
  2. Step 2: Convert to fraction form
    71,370.80/107,056.20 = 64,809.80/x
  3. Step 3: Cross multiply
    71,370.80x = 107,056.20 × 64,809.80
  4. Step 4: Simplify right side
    71,370.80x = 6,938,290,910.76
  5. Step 5: Solve for x
    x = 6,938,290,910.76/71,370.80
  6. Step 6: Final answer
    x = 97,214.70

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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.