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Finding the Fourth Proportional to 117,859.86, 162,720.09 and 82,036.80

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Solution

The fourth proportional to 117,859.86, 162,720.09 and 82,036.80 is: 113,261.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,859.86 : 162,720.09 = 82,036.80 : x
  2. Step 2: Convert to fraction form
    117,859.86/162,720.09 = 82,036.80/x
  3. Step 3: Cross multiply
    117,859.86x = 162,720.09 × 82,036.80
  4. Step 4: Simplify right side
    117,859.86x = 13,349,035,479.31
  5. Step 5: Solve for x
    x = 13,349,035,479.31/117,859.86
  6. Step 6: Final answer
    x = 113,261.93

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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.