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Finding the Fourth Proportional to 52,067.71, 78,085.42 and 18,783.45

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Solution

The fourth proportional to 52,067.71, 78,085.42 and 18,783.45 is: 28,169.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,067.71 : 78,085.42 = 18,783.45 : x
  2. Step 2: Convert to fraction form
    52,067.71/78,085.42 = 18,783.45/x
  3. Step 3: Cross multiply
    52,067.71x = 78,085.42 × 18,783.45
  4. Step 4: Simplify right side
    52,067.71x = 1,466,713,582.30
  5. Step 5: Solve for x
    x = 1,466,713,582.30/52,067.71
  6. Step 6: Final answer
    x = 28,169.35

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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.