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Finding the Fourth Proportional to 71,985.30, 100,648.20 and 71,985.30

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Solution

The fourth proportional to 71,985.30, 100,648.20 and 71,985.30 is: 100,648.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,985.30 : 100,648.20 = 71,985.30 : x
  2. Step 2: Convert to fraction form
    71,985.30/100,648.20 = 71,985.30/x
  3. Step 3: Cross multiply
    71,985.30x = 100,648.20 × 71,985.30
  4. Step 4: Simplify right side
    71,985.30x = 7,245,190,871.46
  5. Step 5: Solve for x
    x = 7,245,190,871.46/71,985.30
  6. Step 6: Final answer
    x = 100,648.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.