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Finding the Fourth Proportional to 85,937.80, 128,953.68 and 33,349.36

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Solution

The fourth proportional to 85,937.80, 128,953.68 and 33,349.36 is: 50,042.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,937.80 : 128,953.68 = 33,349.36 : x
  2. Step 2: Convert to fraction form
    85,937.80/128,953.68 = 33,349.36/x
  3. Step 3: Cross multiply
    85,937.80x = 128,953.68 × 33,349.36
  4. Step 4: Simplify right side
    85,937.80x = 4,300,522,697.64
  5. Step 5: Solve for x
    x = 4,300,522,697.64/85,937.80
  6. Step 6: Final answer
    x = 50,042.27

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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.