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Finding the Fourth Proportional to 85,561.90, 128,364.72 and 32,957.26

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Solution

The fourth proportional to 85,561.90, 128,364.72 and 32,957.26 is: 49,444.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,561.90 : 128,364.72 = 32,957.26 : x
  2. Step 2: Convert to fraction form
    85,561.90/128,364.72 = 32,957.26/x
  3. Step 3: Cross multiply
    85,561.90x = 128,364.72 × 32,957.26
  4. Step 4: Simplify right side
    85,561.90x = 4,230,549,451.87
  5. Step 5: Solve for x
    x = 4,230,549,451.87/85,561.90
  6. Step 6: Final answer
    x = 49,444.31

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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.