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Finding the Fourth Proportional to 85,842.68, 128,782.56 and 35,241.80

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Solution

The fourth proportional to 85,842.68, 128,782.56 and 35,241.80 is: 52,870.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,842.68 : 128,782.56 = 35,241.80 : x
  2. Step 2: Convert to fraction form
    85,842.68/128,782.56 = 35,241.80/x
  3. Step 3: Cross multiply
    85,842.68x = 128,782.56 × 35,241.80
  4. Step 4: Simplify right side
    85,842.68x = 4,538,529,223.01
  5. Step 5: Solve for x
    x = 4,538,529,223.01/85,842.68
  6. Step 6: Final answer
    x = 52,870.31

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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.