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Finding the Fourth Proportional to 85,410.24, 127,928.16 and 70,450.56

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Solution

The fourth proportional to 85,410.24, 127,928.16 and 70,450.56 is: 105,521.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,410.24 : 127,928.16 = 70,450.56 : x
  2. Step 2: Convert to fraction form
    85,410.24/127,928.16 = 70,450.56/x
  3. Step 3: Cross multiply
    85,410.24x = 127,928.16 × 70,450.56
  4. Step 4: Simplify right side
    85,410.24x = 9,012,610,511.77
  5. Step 5: Solve for x
    x = 9,012,610,511.77/85,410.24
  6. Step 6: Final answer
    x = 105,521.43

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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.