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Finding the Fourth Proportional to 40,690.60, 61,035.90 and 34,129.60

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Solution

The fourth proportional to 40,690.60, 61,035.90 and 34,129.60 is: 51,194.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,690.60 : 61,035.90 = 34,129.60 : x
  2. Step 2: Convert to fraction form
    40,690.60/61,035.90 = 34,129.60/x
  3. Step 3: Cross multiply
    40,690.60x = 61,035.90 × 34,129.60
  4. Step 4: Simplify right side
    40,690.60x = 2,083,130,852.64
  5. Step 5: Solve for x
    x = 2,083,130,852.64/40,690.60
  6. Step 6: Final answer
    x = 51,194.40

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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.