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Finding the Fourth Proportional to 81,260.59, 121,871.75 and 45,737.03

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Solution

The fourth proportional to 81,260.59, 121,871.75 and 45,737.03 is: 68,594.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,260.59 : 121,871.75 = 45,737.03 : x
  2. Step 2: Convert to fraction form
    81,260.59/121,871.75 = 45,737.03/x
  3. Step 3: Cross multiply
    81,260.59x = 121,871.75 × 45,737.03
  4. Step 4: Simplify right side
    81,260.59x = 5,574,051,047.86
  5. Step 5: Solve for x
    x = 5,574,051,047.86/81,260.59
  6. Step 6: Final answer
    x = 68,594.77

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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.