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Finding the Fourth Proportional to 57,077.80, 85,616.70 and 38,415.40

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Solution

The fourth proportional to 57,077.80, 85,616.70 and 38,415.40 is: 57,623.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,077.80 : 85,616.70 = 38,415.40 : x
  2. Step 2: Convert to fraction form
    57,077.80/85,616.70 = 38,415.40/x
  3. Step 3: Cross multiply
    57,077.80x = 85,616.70 × 38,415.40
  4. Step 4: Simplify right side
    57,077.80x = 3,288,999,777.18
  5. Step 5: Solve for x
    x = 3,288,999,777.18/57,077.80
  6. Step 6: Final answer
    x = 57,623.10

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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.