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Finding the Fourth Proportional to 85,342.36, 128,014.32 and 32,739.40

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Solution

The fourth proportional to 85,342.36, 128,014.32 and 32,739.40 is: 49,109.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,342.36 : 128,014.32 = 32,739.40 : x
  2. Step 2: Convert to fraction form
    85,342.36/128,014.32 = 32,739.40/x
  3. Step 3: Cross multiply
    85,342.36x = 128,014.32 × 32,739.40
  4. Step 4: Simplify right side
    85,342.36x = 4,191,112,028.21
  5. Step 5: Solve for x
    x = 4,191,112,028.21/85,342.36
  6. Step 6: Final answer
    x = 49,109.40

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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.