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Finding the Fourth Proportional to 84,854.86, 117,108.89 and 54,255.69

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Solution

The fourth proportional to 84,854.86, 117,108.89 and 54,255.69 is: 74,878.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,854.86 : 117,108.89 = 54,255.69 : x
  2. Step 2: Convert to fraction form
    84,854.86/117,108.89 = 54,255.69/x
  3. Step 3: Cross multiply
    84,854.86x = 117,108.89 × 54,255.69
  4. Step 4: Simplify right side
    84,854.86x = 6,353,823,564.26
  5. Step 5: Solve for x
    x = 6,353,823,564.26/84,854.86
  6. Step 6: Final answer
    x = 74,878.73

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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.