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Finding the Fourth Proportional to 57,302.70, 85,966.20 and 17,318.40

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Solution

The fourth proportional to 57,302.70, 85,966.20 and 17,318.40 is: 25,981.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,302.70 : 85,966.20 = 17,318.40 : x
  2. Step 2: Convert to fraction form
    57,302.70/85,966.20 = 17,318.40/x
  3. Step 3: Cross multiply
    57,302.70x = 85,966.20 × 17,318.40
  4. Step 4: Simplify right side
    57,302.70x = 1,488,797,038.08
  5. Step 5: Solve for x
    x = 1,488,797,038.08/57,302.70
  6. Step 6: Final answer
    x = 25,981.27

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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.