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Finding the Fourth Proportional to 68,470.36, 102,705.54 and 25,783.80

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Solution

The fourth proportional to 68,470.36, 102,705.54 and 25,783.80 is: 38,675.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,470.36 : 102,705.54 = 25,783.80 : x
  2. Step 2: Convert to fraction form
    68,470.36/102,705.54 = 25,783.80/x
  3. Step 3: Cross multiply
    68,470.36x = 102,705.54 × 25,783.80
  4. Step 4: Simplify right side
    68,470.36x = 2,648,139,102.25
  5. Step 5: Solve for x
    x = 2,648,139,102.25/68,470.36
  6. Step 6: Final answer
    x = 38,675.70

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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.