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Finding the Fourth Proportional to 90,343.85, 135,417.91 and 40,355.10

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Solution

The fourth proportional to 90,343.85, 135,417.91 and 40,355.10 is: 60,488.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,343.85 : 135,417.91 = 40,355.10 : x
  2. Step 2: Convert to fraction form
    90,343.85/135,417.91 = 40,355.10/x
  3. Step 3: Cross multiply
    90,343.85x = 135,417.91 × 40,355.10
  4. Step 4: Simplify right side
    90,343.85x = 5,464,803,098.07
  5. Step 5: Solve for x
    x = 5,464,803,098.07/90,343.85
  6. Step 6: Final answer
    x = 60,488.94

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.