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Finding the Fourth Proportional to 53,644.54, 74,012.34 and 30,980.54

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Solution

The fourth proportional to 53,644.54, 74,012.34 and 30,980.54 is: 42,743.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,644.54 : 74,012.34 = 30,980.54 : x
  2. Step 2: Convert to fraction form
    53,644.54/74,012.34 = 30,980.54/x
  3. Step 3: Cross multiply
    53,644.54x = 74,012.34 × 30,980.54
  4. Step 4: Simplify right side
    53,644.54x = 2,292,942,259.86
  5. Step 5: Solve for x
    x = 2,292,942,259.86/53,644.54
  6. Step 6: Final answer
    x = 42,743.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.