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Finding the Fourth Proportional to 72,972.15, 100,697.72 and 40,710.14

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Solution

The fourth proportional to 72,972.15, 100,697.72 and 40,710.14 is: 56,177.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,972.15 : 100,697.72 = 40,710.14 : x
  2. Step 2: Convert to fraction form
    72,972.15/100,697.72 = 40,710.14/x
  3. Step 3: Cross multiply
    72,972.15x = 100,697.72 × 40,710.14
  4. Step 4: Simplify right side
    72,972.15x = 4,099,417,571.84
  5. Step 5: Solve for x
    x = 4,099,417,571.84/72,972.15
  6. Step 6: Final answer
    x = 56,177.84

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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.