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Finding the Fourth Proportional to 253,652.81, 380,485.35 and 85,178.66

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Solution

The fourth proportional to 253,652.81, 380,485.35 and 85,178.66 is: 127,770.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,652.81 : 380,485.35 = 85,178.66 : x
  2. Step 2: Convert to fraction form
    253,652.81/380,485.35 = 85,178.66/x
  3. Step 3: Cross multiply
    253,652.81x = 380,485.35 × 85,178.66
  4. Step 4: Simplify right side
    253,652.81x = 32,409,230,360.20
  5. Step 5: Solve for x
    x = 32,409,230,360.20/253,652.81
  6. Step 6: Final answer
    x = 127,770.05

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1.5x scale

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.