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Finding the Fourth Proportional to 91,283.94, 136,725.63 and 75,309.28

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Solution

The fourth proportional to 91,283.94, 136,725.63 and 75,309.28 is: 112,798.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,283.94 : 136,725.63 = 75,309.28 : x
  2. Step 2: Convert to fraction form
    91,283.94/136,725.63 = 75,309.28/x
  3. Step 3: Cross multiply
    91,283.94x = 136,725.63 × 75,309.28
  4. Step 4: Simplify right side
    91,283.94x = 10,296,708,752.85
  5. Step 5: Solve for x
    x = 10,296,708,752.85/91,283.94
  6. Step 6: Final answer
    x = 112,798.69

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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.