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Finding the Fourth Proportional to 72,425.72, 108,804.90 and 51,127.40

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Solution

The fourth proportional to 72,425.72, 108,804.90 and 51,127.40 is: 76,808.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,425.72 : 108,804.90 = 51,127.40 : x
  2. Step 2: Convert to fraction form
    72,425.72/108,804.90 = 51,127.40/x
  3. Step 3: Cross multiply
    72,425.72x = 108,804.90 × 51,127.40
  4. Step 4: Simplify right side
    72,425.72x = 5,562,911,644.26
  5. Step 5: Solve for x
    x = 5,562,911,644.26/72,425.72
  6. Step 6: Final answer
    x = 76,808.51

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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.