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Finding the Fourth Proportional to 81,014.55, 121,521.83 and 81,014.55

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Solution

The fourth proportional to 81,014.55, 121,521.83 and 81,014.55 is: 121,521.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,014.55 : 121,521.83 = 81,014.55 : x
  2. Step 2: Convert to fraction form
    81,014.55/121,521.83 = 81,014.55/x
  3. Step 3: Cross multiply
    81,014.55x = 121,521.83 × 81,014.55
  4. Step 4: Simplify right side
    81,014.55x = 9,845,035,967.55
  5. Step 5: Solve for x
    x = 9,845,035,967.55/81,014.55
  6. Step 6: Final answer
    x = 121,521.83

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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.