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Finding the Fourth Proportional to 81,014.40, 121,521.60 and 64,101.60

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Solution

The fourth proportional to 81,014.40, 121,521.60 and 64,101.60 is: 96,152.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,014.40 : 121,521.60 = 64,101.60 : x
  2. Step 2: Convert to fraction form
    81,014.40/121,521.60 = 64,101.60/x
  3. Step 3: Cross multiply
    81,014.40x = 121,521.60 × 64,101.60
  4. Step 4: Simplify right side
    81,014.40x = 7,789,728,994.56
  5. Step 5: Solve for x
    x = 7,789,728,994.56/81,014.40
  6. Step 6: Final answer
    x = 96,152.40

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.