Home / 85,684.10-128,552.42-38,339.04

Finding the Fourth Proportional to 85,684.10, 128,552.42 and 38,339.04

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Solution

The fourth proportional to 85,684.10, 128,552.42 and 38,339.04 is: 57,520.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,684.10 : 128,552.42 = 38,339.04 : x
  2. Step 2: Convert to fraction form
    85,684.10/128,552.42 = 38,339.04/x
  3. Step 3: Cross multiply
    85,684.10x = 128,552.42 × 38,339.04
  4. Step 4: Simplify right side
    85,684.10x = 4,928,576,011.63
  5. Step 5: Solve for x
    x = 4,928,576,011.63/85,684.10
  6. Step 6: Final answer
    x = 57,520.31

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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.