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Finding the Fourth Proportional to 128,536.86, 192,473.10 and 88,678.74

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Solution

The fourth proportional to 128,536.86, 192,473.10 and 88,678.74 is: 132,788.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,536.86 : 192,473.10 = 88,678.74 : x
  2. Step 2: Convert to fraction form
    128,536.86/192,473.10 = 88,678.74/x
  3. Step 3: Cross multiply
    128,536.86x = 192,473.10 × 88,678.74
  4. Step 4: Simplify right side
    128,536.86x = 17,068,271,991.89
  5. Step 5: Solve for x
    x = 17,068,271,991.89/128,536.86
  6. Step 6: Final answer
    x = 132,788.93

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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.