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Finding the Fourth Proportional to 115,031, 158,790.30 and 76,267.64

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Solution

The fourth proportional to 115,031, 158,790.30 and 76,267.64 is: 105,280.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,031 : 158,790.30 = 76,267.64 : x
  2. Step 2: Convert to fraction form
    115,031/158,790.30 = 76,267.64/x
  3. Step 3: Cross multiply
    115,031x = 158,790.30 × 76,267.64
  4. Step 4: Simplify right side
    115,031x = 12,110,561,435.89
  5. Step 5: Solve for x
    x = 12,110,561,435.89/115,031
  6. Step 6: Final answer
    x = 105,280.85

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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.