Home / 81,743.40-122,615.10-42,312.60

Finding the Fourth Proportional to 81,743.40, 122,615.10 and 42,312.60

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Solution

The fourth proportional to 81,743.40, 122,615.10 and 42,312.60 is: 63,468.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,743.40 : 122,615.10 = 42,312.60 : x
  2. Step 2: Convert to fraction form
    81,743.40/122,615.10 = 42,312.60/x
  3. Step 3: Cross multiply
    81,743.40x = 122,615.10 × 42,312.60
  4. Step 4: Simplify right side
    81,743.40x = 5,188,163,680.26
  5. Step 5: Solve for x
    x = 5,188,163,680.26/81,743.40
  6. Step 6: Final answer
    x = 63,468.90

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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.