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Finding the Fourth Proportional to 459,920.63, 689,828.39 and 122,987.55

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Solution

The fourth proportional to 459,920.63, 689,828.39 and 122,987.55 is: 184,467.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,920.63 : 689,828.39 = 122,987.55 : x
  2. Step 2: Convert to fraction form
    459,920.63/689,828.39 = 122,987.55/x
  3. Step 3: Cross multiply
    459,920.63x = 689,828.39 × 122,987.55
  4. Step 4: Simplify right side
    459,920.63x = 84,840,302,991.61
  5. Step 5: Solve for x
    x = 84,840,302,991.61/459,920.63
  6. Step 6: Final answer
    x = 184,467.27

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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.