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Finding the Fourth Proportional to 84,930.86, 117,215.96 and 54,803.77

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Solution

The fourth proportional to 84,930.86, 117,215.96 and 54,803.77 is: 75,636.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,930.86 : 117,215.96 = 54,803.77 : x
  2. Step 2: Convert to fraction form
    84,930.86/117,215.96 = 54,803.77/x
  3. Step 3: Cross multiply
    84,930.86x = 117,215.96 × 54,803.77
  4. Step 4: Simplify right side
    84,930.86x = 6,423,876,512.17
  5. Step 5: Solve for x
    x = 6,423,876,512.17/84,930.86
  6. Step 6: Final answer
    x = 75,636.54

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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.