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Finding the Fourth Proportional to 85,992.27, 128,835.65 and 73,384.35

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Solution

The fourth proportional to 85,992.27, 128,835.65 and 73,384.35 is: 109,946.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,992.27 : 128,835.65 = 73,384.35 : x
  2. Step 2: Convert to fraction form
    85,992.27/128,835.65 = 73,384.35/x
  3. Step 3: Cross multiply
    85,992.27x = 128,835.65 × 73,384.35
  4. Step 4: Simplify right side
    85,992.27x = 9,454,520,065.16
  5. Step 5: Solve for x
    x = 9,454,520,065.16/85,992.27
  6. Step 6: Final answer
    x = 109,946.16

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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.