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Finding the Fourth Proportional to 43,187.50, 64,676.76 and 20,945.80

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Solution

The fourth proportional to 43,187.50, 64,676.76 and 20,945.80 is: 31,368.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,187.50 : 64,676.76 = 20,945.80 : x
  2. Step 2: Convert to fraction form
    43,187.50/64,676.76 = 20,945.80/x
  3. Step 3: Cross multiply
    43,187.50x = 64,676.76 × 20,945.80
  4. Step 4: Simplify right side
    43,187.50x = 1,354,706,479.61
  5. Step 5: Solve for x
    x = 1,354,706,479.61/43,187.50
  6. Step 6: Final answer
    x = 31,368.02

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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.