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Finding the Fourth Proportional to 128,730.64, 193,041.20 and 58,654.48

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Solution

The fourth proportional to 128,730.64, 193,041.20 and 58,654.48 is: 87,956.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,730.64 : 193,041.20 = 58,654.48 : x
  2. Step 2: Convert to fraction form
    128,730.64/193,041.20 = 58,654.48/x
  3. Step 3: Cross multiply
    128,730.64x = 193,041.20 × 58,654.48
  4. Step 4: Simplify right side
    128,730.64x = 11,322,731,204.58
  5. Step 5: Solve for x
    x = 11,322,731,204.58/128,730.64
  6. Step 6: Final answer
    x = 87,956.77

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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.