Home / 128,890.91-193,336.03-72,705.52

Finding the Fourth Proportional to 128,890.91, 193,336.03 and 72,705.52

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Solution

The fourth proportional to 128,890.91, 193,336.03 and 72,705.52 is: 109,058.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,890.91 : 193,336.03 = 72,705.52 : x
  2. Step 2: Convert to fraction form
    128,890.91/193,336.03 = 72,705.52/x
  3. Step 3: Cross multiply
    128,890.91x = 193,336.03 × 72,705.52
  4. Step 4: Simplify right side
    128,890.91x = 14,056,595,930.78
  5. Step 5: Solve for x
    x = 14,056,595,930.78/128,890.91
  6. Step 6: Final answer
    x = 109,058.08

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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.