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Finding the Fourth Proportional to 77,684.98, 107,222.98 and 55,000.40

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Solution

The fourth proportional to 77,684.98, 107,222.98 and 55,000.40 is: 75,913.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,684.98 : 107,222.98 = 55,000.40 : x
  2. Step 2: Convert to fraction form
    77,684.98/107,222.98 = 55,000.40/x
  3. Step 3: Cross multiply
    77,684.98x = 107,222.98 × 55,000.40
  4. Step 4: Simplify right side
    77,684.98x = 5,897,306,789.19
  5. Step 5: Solve for x
    x = 5,897,306,789.19/77,684.98
  6. Step 6: Final answer
    x = 75,913.09

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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.