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Finding the Fourth Proportional to 138,807.70, 191,554.41 and 75,145.48

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Solution

The fourth proportional to 138,807.70, 191,554.41 and 75,145.48 is: 103,700.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,807.70 : 191,554.41 = 75,145.48 : x
  2. Step 2: Convert to fraction form
    138,807.70/191,554.41 = 75,145.48/x
  3. Step 3: Cross multiply
    138,807.70x = 191,554.41 × 75,145.48
  4. Step 4: Simplify right side
    138,807.70x = 14,394,448,085.57
  5. Step 5: Solve for x
    x = 14,394,448,085.57/138,807.70
  6. Step 6: Final answer
    x = 103,700.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.