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Finding the Fourth Proportional to 56,564.70, 84,812.16 and 19,121.22

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Solution

The fourth proportional to 56,564.70, 84,812.16 and 19,121.22 is: 28,670.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,564.70 : 84,812.16 = 19,121.22 : x
  2. Step 2: Convert to fraction form
    56,564.70/84,812.16 = 19,121.22/x
  3. Step 3: Cross multiply
    56,564.70x = 84,812.16 × 19,121.22
  4. Step 4: Simplify right side
    56,564.70x = 1,621,711,970.04
  5. Step 5: Solve for x
    x = 1,621,711,970.04/56,564.70
  6. Step 6: Final answer
    x = 28,670.04

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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.