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Finding the Fourth Proportional to 100,880.62, 139,210.32 and 58,452.82

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Solution

The fourth proportional to 100,880.62, 139,210.32 and 58,452.82 is: 80,662.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,880.62 : 139,210.32 = 58,452.82 : x
  2. Step 2: Convert to fraction form
    100,880.62/139,210.32 = 58,452.82/x
  3. Step 3: Cross multiply
    100,880.62x = 139,210.32 × 58,452.82
  4. Step 4: Simplify right side
    100,880.62x = 8,137,235,777.10
  5. Step 5: Solve for x
    x = 8,137,235,777.10/100,880.62
  6. Step 6: Final answer
    x = 80,662.03

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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.