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Finding the Fourth Proportional to 84,853.92, 117,099.12 and 47,128.80

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Solution

The fourth proportional to 84,853.92, 117,099.12 and 47,128.80 is: 65,038.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,853.92 : 117,099.12 = 47,128.80 : x
  2. Step 2: Convert to fraction form
    84,853.92/117,099.12 = 47,128.80/x
  3. Step 3: Cross multiply
    84,853.92x = 117,099.12 × 47,128.80
  4. Step 4: Simplify right side
    84,853.92x = 5,518,741,006.66
  5. Step 5: Solve for x
    x = 5,518,741,006.66/84,853.92
  6. Step 6: Final answer
    x = 65,038.14

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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.