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Finding the Fourth Proportional to 55,608.60, 76,720.80 and 31,718.08

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Solution

The fourth proportional to 55,608.60, 76,720.80 and 31,718.08 is: 43,760.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,608.60 : 76,720.80 = 31,718.08 : x
  2. Step 2: Convert to fraction form
    55,608.60/76,720.80 = 31,718.08/x
  3. Step 3: Cross multiply
    55,608.60x = 76,720.80 × 31,718.08
  4. Step 4: Simplify right side
    55,608.60x = 2,433,436,472.06
  5. Step 5: Solve for x
    x = 2,433,436,472.06/55,608.60
  6. Step 6: Final answer
    x = 43,760.07

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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.