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Finding the Fourth Proportional to 72,415.40, 108,623.10 and 69,462.95

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Solution

The fourth proportional to 72,415.40, 108,623.10 and 69,462.95 is: 104,194.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,415.40 : 108,623.10 = 69,462.95 : x
  2. Step 2: Convert to fraction form
    72,415.40/108,623.10 = 69,462.95/x
  3. Step 3: Cross multiply
    72,415.40x = 108,623.10 × 69,462.95
  4. Step 4: Simplify right side
    72,415.40x = 7,545,280,964.15
  5. Step 5: Solve for x
    x = 7,545,280,964.15/72,415.40
  6. Step 6: Final answer
    x = 104,194.43

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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.