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Finding the Fourth Proportional to 84,308.54, 116,878.51 and 79,814.18

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Solution

The fourth proportional to 84,308.54, 116,878.51 and 79,814.18 is: 110,647.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,308.54 : 116,878.51 = 79,814.18 : x
  2. Step 2: Convert to fraction form
    84,308.54/116,878.51 = 79,814.18/x
  3. Step 3: Cross multiply
    84,308.54x = 116,878.51 × 79,814.18
  4. Step 4: Simplify right side
    84,308.54x = 9,328,562,036.20
  5. Step 5: Solve for x
    x = 9,328,562,036.20/84,308.54
  6. Step 6: Final answer
    x = 110,647.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.