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Finding the Fourth Proportional to 80,913.15, 121,424.40 and 45,374.40

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Solution

The fourth proportional to 80,913.15, 121,424.40 and 45,374.40 is: 68,092.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,913.15 : 121,424.40 = 45,374.40 : x
  2. Step 2: Convert to fraction form
    80,913.15/121,424.40 = 45,374.40/x
  3. Step 3: Cross multiply
    80,913.15x = 121,424.40 × 45,374.40
  4. Step 4: Simplify right side
    80,913.15x = 5,509,559,295.36
  5. Step 5: Solve for x
    x = 5,509,559,295.36/80,913.15
  6. Step 6: Final answer
    x = 68,092.26

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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.