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Finding the Fourth Proportional to 72,817.14, 100,455.16 and 59,443.64

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Solution

The fourth proportional to 72,817.14, 100,455.16 and 59,443.64 is: 82,005.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,817.14 : 100,455.16 = 59,443.64 : x
  2. Step 2: Convert to fraction form
    72,817.14/100,455.16 = 59,443.64/x
  3. Step 3: Cross multiply
    72,817.14x = 100,455.16 × 59,443.64
  4. Step 4: Simplify right side
    72,817.14x = 5,971,420,367.18
  5. Step 5: Solve for x
    x = 5,971,420,367.18/72,817.14
  6. Step 6: Final answer
    x = 82,005.70

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1.5x scale

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.