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Finding the Fourth Proportional to 92,956.60, 128,528.94 and 81,146.80

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Solution

The fourth proportional to 92,956.60, 128,528.94 and 81,146.80 is: 112,199.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,956.60 : 128,528.94 = 81,146.80 : x
  2. Step 2: Convert to fraction form
    92,956.60/128,528.94 = 81,146.80/x
  3. Step 3: Cross multiply
    92,956.60x = 128,528.94 × 81,146.80
  4. Step 4: Simplify right side
    92,956.60x = 10,429,712,188.39
  5. Step 5: Solve for x
    x = 10,429,712,188.39/92,956.60
  6. Step 6: Final answer
    x = 112,199.80

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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.