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Finding the Fourth Proportional to 128,987.84, 193,488.50 and 39,028.27

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Solution

The fourth proportional to 128,987.84, 193,488.50 and 39,028.27 is: 58,544.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,987.84 : 193,488.50 = 39,028.27 : x
  2. Step 2: Convert to fraction form
    128,987.84/193,488.50 = 39,028.27/x
  3. Step 3: Cross multiply
    128,987.84x = 193,488.50 × 39,028.27
  4. Step 4: Simplify right side
    128,987.84x = 7,551,521,419.90
  5. Step 5: Solve for x
    x = 7,551,521,419.90/128,987.84
  6. Step 6: Final answer
    x = 58,544.44

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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.