Home / 85,606.32-128,439.93-38,217.12

Finding the Fourth Proportional to 85,606.32, 128,439.93 and 38,217.12

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Solution

The fourth proportional to 85,606.32, 128,439.93 and 38,217.12 is: 57,339.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,606.32 : 128,439.93 = 38,217.12 : x
  2. Step 2: Convert to fraction form
    85,606.32/128,439.93 = 38,217.12/x
  3. Step 3: Cross multiply
    85,606.32x = 128,439.93 × 38,217.12
  4. Step 4: Simplify right side
    85,606.32x = 4,908,604,217.60
  5. Step 5: Solve for x
    x = 4,908,604,217.60/85,606.32
  6. Step 6: Final answer
    x = 57,339.27

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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.