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Finding the Fourth Proportional to 92,884.70, 128,234.03 and 61,145.87

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Solution

The fourth proportional to 92,884.70, 128,234.03 and 61,145.87 is: 84,416.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,884.70 : 128,234.03 = 61,145.87 : x
  2. Step 2: Convert to fraction form
    92,884.70/128,234.03 = 61,145.87/x
  3. Step 3: Cross multiply
    92,884.70x = 128,234.03 × 61,145.87
  4. Step 4: Simplify right side
    92,884.70x = 7,840,980,381.06
  5. Step 5: Solve for x
    x = 7,840,980,381.06/92,884.70
  6. Step 6: Final answer
    x = 84,416.27

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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.