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Finding the Fourth Proportional to 150,638.88, 207,900.10 and 86,976.58

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Solution

The fourth proportional to 150,638.88, 207,900.10 and 86,976.58 is: 120,038.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    150,638.88 : 207,900.10 = 86,976.58 : x
  2. Step 2: Convert to fraction form
    150,638.88/207,900.10 = 86,976.58/x
  3. Step 3: Cross multiply
    150,638.88x = 207,900.10 × 86,976.58
  4. Step 4: Simplify right side
    150,638.88x = 18,082,439,679.66
  5. Step 5: Solve for x
    x = 18,082,439,679.66/150,638.88
  6. Step 6: Final answer
    x = 120,038.33

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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.