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Finding the Fourth Proportional to 90,295.40, 135,494.94 and 70,518.44

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Solution

The fourth proportional to 90,295.40, 135,494.94 and 70,518.44 is: 105,818.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,295.40 : 135,494.94 = 70,518.44 : x
  2. Step 2: Convert to fraction form
    90,295.40/135,494.94 = 70,518.44/x
  3. Step 3: Cross multiply
    90,295.40x = 135,494.94 × 70,518.44
  4. Step 4: Simplify right side
    90,295.40x = 9,554,891,796.69
  5. Step 5: Solve for x
    x = 9,554,891,796.69/90,295.40
  6. Step 6: Final answer
    x = 105,818.15

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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.