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Finding the Fourth Proportional to 128,956.94, 193,373.16 and 54,056.98

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Solution

The fourth proportional to 128,956.94, 193,373.16 and 54,056.98 is: 81,059.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,956.94 : 193,373.16 = 54,056.98 : x
  2. Step 2: Convert to fraction form
    128,956.94/193,373.16 = 54,056.98/x
  3. Step 3: Cross multiply
    128,956.94x = 193,373.16 × 54,056.98
  4. Step 4: Simplify right side
    128,956.94x = 10,453,168,298.01
  5. Step 5: Solve for x
    x = 10,453,168,298.01/128,956.94
  6. Step 6: Final answer
    x = 81,059.37

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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.