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Finding the Fourth Proportional to 81,657.83, 122,504.25 and 28,351.50

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Solution

The fourth proportional to 81,657.83, 122,504.25 and 28,351.50 is: 42,533.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,657.83 : 122,504.25 = 28,351.50 : x
  2. Step 2: Convert to fraction form
    81,657.83/122,504.25 = 28,351.50/x
  3. Step 3: Cross multiply
    81,657.83x = 122,504.25 × 28,351.50
  4. Step 4: Simplify right side
    81,657.83x = 3,473,178,890.80
  5. Step 5: Solve for x
    x = 3,473,178,890.80/81,657.83
  6. Step 6: Final answer
    x = 42,533.32

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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.