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Finding the Fourth Proportional to 84,015.96, 115,939.28 and 48,205.40

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Solution

The fourth proportional to 84,015.96, 115,939.28 and 48,205.40 is: 66,521.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,015.96 : 115,939.28 = 48,205.40 : x
  2. Step 2: Convert to fraction form
    84,015.96/115,939.28 = 48,205.40/x
  3. Step 3: Cross multiply
    84,015.96x = 115,939.28 × 48,205.40
  4. Step 4: Simplify right side
    84,015.96x = 5,588,899,368.11
  5. Step 5: Solve for x
    x = 5,588,899,368.11/84,015.96
  6. Step 6: Final answer
    x = 66,521.88

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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.