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Finding the Fourth Proportional to 72,028.70, 107,913.45 and 61,660.70

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Solution

The fourth proportional to 72,028.70, 107,913.45 and 61,660.70 is: 92,380.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,028.70 : 107,913.45 = 61,660.70 : x
  2. Step 2: Convert to fraction form
    72,028.70/107,913.45 = 61,660.70/x
  3. Step 3: Cross multiply
    72,028.70x = 107,913.45 × 61,660.70
  4. Step 4: Simplify right side
    72,028.70x = 6,654,018,866.42
  5. Step 5: Solve for x
    x = 6,654,018,866.42/72,028.70
  6. Step 6: Final answer
    x = 92,380.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.