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Finding the Fourth Proportional to 91,364.82, 136,903.61 and 70,279.41

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Solution

The fourth proportional to 91,364.82, 136,903.61 and 70,279.41 is: 105,308.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,364.82 : 136,903.61 = 70,279.41 : x
  2. Step 2: Convert to fraction form
    91,364.82/136,903.61 = 70,279.41/x
  3. Step 3: Cross multiply
    91,364.82x = 136,903.61 × 70,279.41
  4. Step 4: Simplify right side
    91,364.82x = 9,621,504,937.67
  5. Step 5: Solve for x
    x = 9,621,504,937.67/91,364.82
  6. Step 6: Final answer
    x = 105,308.64

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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.