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Finding the Fourth Proportional to 201,639.52, 302,460.14 and 81,698.80

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Solution

The fourth proportional to 201,639.52, 302,460.14 and 81,698.80 is: 122,548.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,639.52 : 302,460.14 = 81,698.80 : x
  2. Step 2: Convert to fraction form
    201,639.52/302,460.14 = 81,698.80/x
  3. Step 3: Cross multiply
    201,639.52x = 302,460.14 × 81,698.80
  4. Step 4: Simplify right side
    201,639.52x = 24,710,630,485.83
  5. Step 5: Solve for x
    x = 24,710,630,485.83/201,639.52
  6. Step 6: Final answer
    x = 122,548.55

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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.