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Finding the Fourth Proportional to 57,129.76, 85,661.76 and 22,064.80

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Solution

The fourth proportional to 57,129.76, 85,661.76 and 22,064.80 is: 33,084.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,129.76 : 85,661.76 = 22,064.80 : x
  2. Step 2: Convert to fraction form
    57,129.76/85,661.76 = 22,064.80/x
  3. Step 3: Cross multiply
    57,129.76x = 85,661.76 × 22,064.80
  4. Step 4: Simplify right side
    57,129.76x = 1,890,109,602.05
  5. Step 5: Solve for x
    x = 1,890,109,602.05/57,129.76
  6. Step 6: Final answer
    x = 33,084.50

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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.