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Finding the Fourth Proportional to 71,622.87, 98,840.16 and 39,792.30

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Solution

The fourth proportional to 71,622.87, 98,840.16 and 39,792.30 is: 54,913.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,622.87 : 98,840.16 = 39,792.30 : x
  2. Step 2: Convert to fraction form
    71,622.87/98,840.16 = 39,792.30/x
  3. Step 3: Cross multiply
    71,622.87x = 98,840.16 × 39,792.30
  4. Step 4: Simplify right side
    71,622.87x = 3,933,077,298.77
  5. Step 5: Solve for x
    x = 3,933,077,298.77/71,622.87
  6. Step 6: Final answer
    x = 54,913.71

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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.