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Finding the Fourth Proportional to 85,549.08, 128,268.92 and 35,663.60

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Solution

The fourth proportional to 85,549.08, 128,268.92 and 35,663.60 is: 53,472.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,549.08 : 128,268.92 = 35,663.60 : x
  2. Step 2: Convert to fraction form
    85,549.08/128,268.92 = 35,663.60/x
  3. Step 3: Cross multiply
    85,549.08x = 128,268.92 × 35,663.60
  4. Step 4: Simplify right side
    85,549.08x = 4,574,531,455.31
  5. Step 5: Solve for x
    x = 4,574,531,455.31/85,549.08
  6. Step 6: Final answer
    x = 53,472.60

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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.