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Finding the Fourth Proportional to 85,369.95, 128,054.52 and 35,448.84

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Solution

The fourth proportional to 85,369.95, 128,054.52 and 35,448.84 is: 53,173.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,369.95 : 128,054.52 = 35,448.84 : x
  2. Step 2: Convert to fraction form
    85,369.95/128,054.52 = 35,448.84/x
  3. Step 3: Cross multiply
    85,369.95x = 128,054.52 × 35,448.84
  4. Step 4: Simplify right side
    85,369.95x = 4,539,384,190.76
  5. Step 5: Solve for x
    x = 4,539,384,190.76/85,369.95
  6. Step 6: Final answer
    x = 53,173.09

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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.