Home / 85,436.22-128,034.01-40,409.54

Finding the Fourth Proportional to 85,436.22, 128,034.01 and 40,409.54

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Solution

The fourth proportional to 85,436.22, 128,034.01 and 40,409.54 is: 60,557.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,436.22 : 128,034.01 = 40,409.54 : x
  2. Step 2: Convert to fraction form
    85,436.22/128,034.01 = 40,409.54/x
  3. Step 3: Cross multiply
    85,436.22x = 128,034.01 × 40,409.54
  4. Step 4: Simplify right side
    85,436.22x = 5,173,795,448.46
  5. Step 5: Solve for x
    x = 5,173,795,448.46/85,436.22
  6. Step 6: Final answer
    x = 60,557.40

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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.