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Finding the Fourth Proportional to 57,302.80, 85,954.20 and 19,905.10

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Solution

The fourth proportional to 57,302.80, 85,954.20 and 19,905.10 is: 29,857.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,302.80 : 85,954.20 = 19,905.10 : x
  2. Step 2: Convert to fraction form
    57,302.80/85,954.20 = 19,905.10/x
  3. Step 3: Cross multiply
    57,302.80x = 85,954.20 × 19,905.10
  4. Step 4: Simplify right side
    57,302.80x = 1,710,926,946.42
  5. Step 5: Solve for x
    x = 1,710,926,946.42/57,302.80
  6. Step 6: Final answer
    x = 29,857.65

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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.