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Finding the Fourth Proportional to 128,488.69, 192,622.29 and 49,658.23

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Solution

The fourth proportional to 128,488.69, 192,622.29 and 49,658.23 is: 74,444.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,488.69 : 192,622.29 = 49,658.23 : x
  2. Step 2: Convert to fraction form
    128,488.69/192,622.29 = 49,658.23/x
  3. Step 3: Cross multiply
    128,488.69x = 192,622.29 × 49,658.23
  4. Step 4: Simplify right side
    128,488.69x = 9,565,281,979.95
  5. Step 5: Solve for x
    x = 9,565,281,979.95/128,488.69
  6. Step 6: Final answer
    x = 74,444.54

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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.