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Finding the Fourth Proportional to 85,725.72, 118,282.36 and 51,739.72

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Solution

The fourth proportional to 85,725.72, 118,282.36 and 51,739.72 is: 71,389.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,725.72 : 118,282.36 = 51,739.72 : x
  2. Step 2: Convert to fraction form
    85,725.72/118,282.36 = 51,739.72/x
  3. Step 3: Cross multiply
    85,725.72x = 118,282.36 × 51,739.72
  4. Step 4: Simplify right side
    85,725.72x = 6,119,896,187.34
  5. Step 5: Solve for x
    x = 6,119,896,187.34/85,725.72
  6. Step 6: Final answer
    x = 71,389.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.