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Finding the Fourth Proportional to 55,064.88, 75,987 and 31,195.08

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Solution

The fourth proportional to 55,064.88, 75,987 and 31,195.08 is: 43,047.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,064.88 : 75,987 = 31,195.08 : x
  2. Step 2: Convert to fraction form
    55,064.88/75,987 = 31,195.08/x
  3. Step 3: Cross multiply
    55,064.88x = 75,987 × 31,195.08
  4. Step 4: Simplify right side
    55,064.88x = 2,370,420,543.96
  5. Step 5: Solve for x
    x = 2,370,420,543.96/55,064.88
  6. Step 6: Final answer
    x = 43,047.77

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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.