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Finding the Fourth Proportional to 61,419.60, 92,129.40 and 40,424.40

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Solution

The fourth proportional to 61,419.60, 92,129.40 and 40,424.40 is: 60,636.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,419.60 : 92,129.40 = 40,424.40 : x
  2. Step 2: Convert to fraction form
    61,419.60/92,129.40 = 40,424.40/x
  3. Step 3: Cross multiply
    61,419.60x = 92,129.40 × 40,424.40
  4. Step 4: Simplify right side
    61,419.60x = 3,724,275,717.36
  5. Step 5: Solve for x
    x = 3,724,275,717.36/61,419.60
  6. Step 6: Final answer
    x = 60,636.60

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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.