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Finding the Fourth Proportional to 72,902.44, 109,353.64 and 56,286.76

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Solution

The fourth proportional to 72,902.44, 109,353.64 and 56,286.76 is: 84,430.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,902.44 : 109,353.64 = 56,286.76 : x
  2. Step 2: Convert to fraction form
    72,902.44/109,353.64 = 56,286.76/x
  3. Step 3: Cross multiply
    72,902.44x = 109,353.64 × 56,286.76
  4. Step 4: Simplify right side
    72,902.44x = 6,155,162,089.81
  5. Step 5: Solve for x
    x = 6,155,162,089.81/72,902.44
  6. Step 6: Final answer
    x = 84,430.12

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1.5x scale

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.