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Finding the Fourth Proportional to 85,325.42, 128,021.40 and 35,392.88

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Solution

The fourth proportional to 85,325.42, 128,021.40 and 35,392.88 is: 53,103.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,325.42 : 128,021.40 = 35,392.88 : x
  2. Step 2: Convert to fraction form
    85,325.42/128,021.40 = 35,392.88/x
  3. Step 3: Cross multiply
    85,325.42x = 128,021.40 × 35,392.88
  4. Step 4: Simplify right side
    85,325.42x = 4,531,046,047.63
  5. Step 5: Solve for x
    x = 4,531,046,047.63/85,325.42
  6. Step 6: Final answer
    x = 53,103.12

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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.