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Finding the Fourth Proportional to 83,108.66, 124,662.99 and 20,779.16

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Solution

The fourth proportional to 83,108.66, 124,662.99 and 20,779.16 is: 31,168.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,108.66 : 124,662.99 = 20,779.16 : x
  2. Step 2: Convert to fraction form
    83,108.66/124,662.99 = 20,779.16/x
  3. Step 3: Cross multiply
    83,108.66x = 124,662.99 × 20,779.16
  4. Step 4: Simplify right side
    83,108.66x = 2,590,392,390.59
  5. Step 5: Solve for x
    x = 2,590,392,390.59/83,108.66
  6. Step 6: Final answer
    x = 31,168.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.