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Finding the Fourth Proportional to 115,392.66, 172,786.80 and 92,783.16

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Solution

The fourth proportional to 115,392.66, 172,786.80 and 92,783.16 is: 138,931.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,392.66 : 172,786.80 = 92,783.16 : x
  2. Step 2: Convert to fraction form
    115,392.66/172,786.80 = 92,783.16/x
  3. Step 3: Cross multiply
    115,392.66x = 172,786.80 × 92,783.16
  4. Step 4: Simplify right side
    115,392.66x = 16,031,705,310.29
  5. Step 5: Solve for x
    x = 16,031,705,310.29/115,392.66
  6. Step 6: Final answer
    x = 138,931.76

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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.