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Finding the Fourth Proportional to 78,775.84, 118,128.11 and 22,603.05

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Solution

The fourth proportional to 78,775.84, 118,128.11 and 22,603.05 is: 33,894.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,775.84 : 118,128.11 = 22,603.05 : x
  2. Step 2: Convert to fraction form
    78,775.84/118,128.11 = 22,603.05/x
  3. Step 3: Cross multiply
    78,775.84x = 118,128.11 × 22,603.05
  4. Step 4: Simplify right side
    78,775.84x = 2,670,055,463.72
  5. Step 5: Solve for x
    x = 2,670,055,463.72/78,775.84
  6. Step 6: Final answer
    x = 33,894.34

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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.