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Finding the Fourth Proportional to 51,395.60, 77,035.80 and 21,808.40

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Solution

The fourth proportional to 51,395.60, 77,035.80 and 21,808.40 is: 32,688.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,395.60 : 77,035.80 = 21,808.40 : x
  2. Step 2: Convert to fraction form
    51,395.60/77,035.80 = 21,808.40/x
  3. Step 3: Cross multiply
    51,395.60x = 77,035.80 × 21,808.40
  4. Step 4: Simplify right side
    51,395.60x = 1,680,027,540.72
  5. Step 5: Solve for x
    x = 1,680,027,540.72/51,395.60
  6. Step 6: Final answer
    x = 32,688.16

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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.