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Finding the Fourth Proportional to 78,855.54, 118,152.09 and 34,415.70

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Solution

The fourth proportional to 78,855.54, 118,152.09 and 34,415.70 is: 51,566.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,855.54 : 118,152.09 = 34,415.70 : x
  2. Step 2: Convert to fraction form
    78,855.54/118,152.09 = 34,415.70/x
  3. Step 3: Cross multiply
    78,855.54x = 118,152.09 × 34,415.70
  4. Step 4: Simplify right side
    78,855.54x = 4,066,286,883.81
  5. Step 5: Solve for x
    x = 4,066,286,883.81/78,855.54
  6. Step 6: Final answer
    x = 51,566.28

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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.