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Finding the Fourth Proportional to 72,892.90, 100,588.80 and 49,015.72

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Solution

The fourth proportional to 72,892.90, 100,588.80 and 49,015.72 is: 67,639.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,892.90 : 100,588.80 = 49,015.72 : x
  2. Step 2: Convert to fraction form
    72,892.90/100,588.80 = 49,015.72/x
  3. Step 3: Cross multiply
    72,892.90x = 100,588.80 × 49,015.72
  4. Step 4: Simplify right side
    72,892.90x = 4,930,432,455.94
  5. Step 5: Solve for x
    x = 4,930,432,455.94/72,892.90
  6. Step 6: Final answer
    x = 67,639.41

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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.