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Finding the Fourth Proportional to 53,878.57, 80,817.85 and 20,602.00

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Solution

The fourth proportional to 53,878.57, 80,817.85 and 20,602.00 is: 30,902.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,878.57 : 80,817.85 = 20,602.00 : x
  2. Step 2: Convert to fraction form
    53,878.57/80,817.85 = 20,602.00/x
  3. Step 3: Cross multiply
    53,878.57x = 80,817.85 × 20,602.00
  4. Step 4: Simplify right side
    53,878.57x = 1,665,009,017.87
  5. Step 5: Solve for x
    x = 1,665,009,017.87/53,878.57
  6. Step 6: Final answer
    x = 30,902.99

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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.