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Finding the Fourth Proportional to 85,563, 128,289.96 and 35,677.80

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Solution

The fourth proportional to 85,563, 128,289.96 and 35,677.80 is: 53,493.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,563 : 128,289.96 = 35,677.80 : x
  2. Step 2: Convert to fraction form
    85,563/128,289.96 = 35,677.80/x
  3. Step 3: Cross multiply
    85,563x = 128,289.96 × 35,677.80
  4. Step 4: Simplify right side
    85,563x = 4,577,103,534.89
  5. Step 5: Solve for x
    x = 4,577,103,534.89/85,563
  6. Step 6: Final answer
    x = 53,493.96

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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.