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Finding the Fourth Proportional to 85,714.40, 128,525.52 and 26,524.64

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Solution

The fourth proportional to 85,714.40, 128,525.52 and 26,524.64 is: 39,772.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,714.40 : 128,525.52 = 26,524.64 : x
  2. Step 2: Convert to fraction form
    85,714.40/128,525.52 = 26,524.64/x
  3. Step 3: Cross multiply
    85,714.40x = 128,525.52 × 26,524.64
  4. Step 4: Simplify right side
    85,714.40x = 3,409,093,148.81
  5. Step 5: Solve for x
    x = 3,409,093,148.81/85,714.40
  6. Step 6: Final answer
    x = 39,772.70

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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.