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Finding the Fourth Proportional to 55,118.40, 76,065.60 and 31,248

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Solution

The fourth proportional to 55,118.40, 76,065.60 and 31,248 is: 43,123.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,118.40 : 76,065.60 = 31,248 : x
  2. Step 2: Convert to fraction form
    55,118.40/76,065.60 = 31,248/x
  3. Step 3: Cross multiply
    55,118.40x = 76,065.60 × 31,248
  4. Step 4: Simplify right side
    55,118.40x = 2,376,897,868.80
  5. Step 5: Solve for x
    x = 2,376,897,868.80/55,118.40
  6. Step 6: Final answer
    x = 43,123.49

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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.