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Finding the Fourth Proportional to 57,152.20, 85,728.30 and 17,721.40

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Solution

The fourth proportional to 57,152.20, 85,728.30 and 17,721.40 is: 26,582.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,152.20 : 85,728.30 = 17,721.40 : x
  2. Step 2: Convert to fraction form
    57,152.20/85,728.30 = 17,721.40/x
  3. Step 3: Cross multiply
    57,152.20x = 85,728.30 × 17,721.40
  4. Step 4: Simplify right side
    57,152.20x = 1,519,225,495.62
  5. Step 5: Solve for x
    x = 1,519,225,495.62/57,152.20
  6. Step 6: Final answer
    x = 26,582.10

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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.