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Finding the Fourth Proportional to 100,131.58, 138,180.90 and 57,689.20

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Solution

The fourth proportional to 100,131.58, 138,180.90 and 57,689.20 is: 79,610.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,131.58 : 138,180.90 = 57,689.20 : x
  2. Step 2: Convert to fraction form
    100,131.58/138,180.90 = 57,689.20/x
  3. Step 3: Cross multiply
    100,131.58x = 138,180.90 × 57,689.20
  4. Step 4: Simplify right side
    100,131.58x = 7,971,545,576.28
  5. Step 5: Solve for x
    x = 7,971,545,576.28/100,131.58
  6. Step 6: Final answer
    x = 79,610.70

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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.