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Finding the Fourth Proportional to 85,381.64, 117,786.64 and 55,176.46

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Solution

The fourth proportional to 85,381.64, 117,786.64 and 55,176.46 is: 76,117.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,381.64 : 117,786.64 = 55,176.46 : x
  2. Step 2: Convert to fraction form
    85,381.64/117,786.64 = 55,176.46/x
  3. Step 3: Cross multiply
    85,381.64x = 117,786.64 × 55,176.46
  4. Step 4: Simplify right side
    85,381.64x = 6,499,049,830.49
  5. Step 5: Solve for x
    x = 6,499,049,830.49/85,381.64
  6. Step 6: Final answer
    x = 76,117.65

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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.