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Finding the Fourth Proportional to 85,656.75, 128,484.71 and 57,133.41

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Solution

The fourth proportional to 85,656.75, 128,484.71 and 57,133.41 is: 85,699.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,656.75 : 128,484.71 = 57,133.41 : x
  2. Step 2: Convert to fraction form
    85,656.75/128,484.71 = 57,133.41/x
  3. Step 3: Cross multiply
    85,656.75x = 128,484.71 × 57,133.41
  4. Step 4: Simplify right side
    85,656.75x = 7,340,769,383.30
  5. Step 5: Solve for x
    x = 7,340,769,383.30/85,656.75
  6. Step 6: Final answer
    x = 85,699.84

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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.