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Finding the Fourth Proportional to 57,690.40, 86,506.80 and 26,490.40

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Solution

The fourth proportional to 57,690.40, 86,506.80 and 26,490.40 is: 39,722.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,690.40 : 86,506.80 = 26,490.40 : x
  2. Step 2: Convert to fraction form
    57,690.40/86,506.80 = 26,490.40/x
  3. Step 3: Cross multiply
    57,690.40x = 86,506.80 × 26,490.40
  4. Step 4: Simplify right side
    57,690.40x = 2,291,599,734.72
  5. Step 5: Solve for x
    x = 2,291,599,734.72/57,690.40
  6. Step 6: Final answer
    x = 39,722.38

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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.