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Finding the Fourth Proportional to 45,657.60, 68,486.40 and 21,081.60

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Solution

The fourth proportional to 45,657.60, 68,486.40 and 21,081.60 is: 31,622.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,657.60 : 68,486.40 = 21,081.60 : x
  2. Step 2: Convert to fraction form
    45,657.60/68,486.40 = 21,081.60/x
  3. Step 3: Cross multiply
    45,657.60x = 68,486.40 × 21,081.60
  4. Step 4: Simplify right side
    45,657.60x = 1,443,802,890.24
  5. Step 5: Solve for x
    x = 1,443,802,890.24/45,657.60
  6. Step 6: Final answer
    x = 31,622.40

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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.