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Finding the Fourth Proportional to 128,044.77, 191,972.04 and 61,421.46

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Solution

The fourth proportional to 128,044.77, 191,972.04 and 61,421.46 is: 92,086.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,044.77 : 191,972.04 = 61,421.46 : x
  2. Step 2: Convert to fraction form
    128,044.77/191,972.04 = 61,421.46/x
  3. Step 3: Cross multiply
    128,044.77x = 191,972.04 × 61,421.46
  4. Step 4: Simplify right side
    128,044.77x = 11,791,202,975.98
  5. Step 5: Solve for x
    x = 11,791,202,975.98/128,044.77
  6. Step 6: Final answer
    x = 92,086.56

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1.5x scale

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.