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Finding the Fourth Proportional to 78,551.96, 108,405.50 and 45,018.04

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Solution

The fourth proportional to 78,551.96, 108,405.50 and 45,018.04 is: 62,127.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,551.96 : 108,405.50 = 45,018.04 : x
  2. Step 2: Convert to fraction form
    78,551.96/108,405.50 = 45,018.04/x
  3. Step 3: Cross multiply
    78,551.96x = 108,405.50 × 45,018.04
  4. Step 4: Simplify right side
    78,551.96x = 4,880,203,135.22
  5. Step 5: Solve for x
    x = 4,880,203,135.22/78,551.96
  6. Step 6: Final answer
    x = 62,127.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.