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Finding the Fourth Proportional to 131,703.01, 181,705.64 and 85,741.61

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Solution

The fourth proportional to 131,703.01, 181,705.64 and 85,741.61 is: 118,294.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,703.01 : 181,705.64 = 85,741.61 : x
  2. Step 2: Convert to fraction form
    131,703.01/181,705.64 = 85,741.61/x
  3. Step 3: Cross multiply
    131,703.01x = 181,705.64 × 85,741.61
  4. Step 4: Simplify right side
    131,703.01x = 15,579,732,782.44
  5. Step 5: Solve for x
    x = 15,579,732,782.44/131,703.01
  6. Step 6: Final answer
    x = 118,294.43

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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.