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Finding the Fourth Proportional to 84,771.90, 117,263.70 and 79,027.38

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Solution

The fourth proportional to 84,771.90, 117,263.70 and 79,027.38 is: 109,317.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,771.90 : 117,263.70 = 79,027.38 : x
  2. Step 2: Convert to fraction form
    84,771.90/117,263.70 = 79,027.38/x
  3. Step 3: Cross multiply
    84,771.90x = 117,263.70 × 79,027.38
  4. Step 4: Simplify right side
    84,771.90x = 9,267,042,980.11
  5. Step 5: Solve for x
    x = 9,267,042,980.11/84,771.90
  6. Step 6: Final answer
    x = 109,317.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.