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Finding the Fourth Proportional to 72,230.40, 108,475.20 and 69,897.60

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Solution

The fourth proportional to 72,230.40, 108,475.20 and 69,897.60 is: 104,971.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,230.40 : 108,475.20 = 69,897.60 : x
  2. Step 2: Convert to fraction form
    72,230.40/108,475.20 = 69,897.60/x
  3. Step 3: Cross multiply
    72,230.40x = 108,475.20 × 69,897.60
  4. Step 4: Simplify right side
    72,230.40x = 7,582,156,139.52
  5. Step 5: Solve for x
    x = 7,582,156,139.52/72,230.40
  6. Step 6: Final answer
    x = 104,971.81

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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.