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Finding the Fourth Proportional to 56,609.80, 84,860.70 and 21,061.60

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Solution

The fourth proportional to 56,609.80, 84,860.70 and 21,061.60 is: 31,572.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,609.80 : 84,860.70 = 21,061.60 : x
  2. Step 2: Convert to fraction form
    56,609.80/84,860.70 = 21,061.60/x
  3. Step 3: Cross multiply
    56,609.80x = 84,860.70 × 21,061.60
  4. Step 4: Simplify right side
    56,609.80x = 1,787,302,119.12
  5. Step 5: Solve for x
    x = 1,787,302,119.12/56,609.80
  6. Step 6: Final answer
    x = 31,572.31

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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.