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Finding the Fourth Proportional to 122,040.78, 183,088.76 and 65,879.68

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Solution

The fourth proportional to 122,040.78, 183,088.76 and 65,879.68 is: 98,834.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,040.78 : 183,088.76 = 65,879.68 : x
  2. Step 2: Convert to fraction form
    122,040.78/183,088.76 = 65,879.68/x
  3. Step 3: Cross multiply
    122,040.78x = 183,088.76 × 65,879.68
  4. Step 4: Simplify right side
    122,040.78x = 12,061,828,920.40
  5. Step 5: Solve for x
    x = 12,061,828,920.40/122,040.78
  6. Step 6: Final answer
    x = 98,834.41

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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.