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Finding the Fourth Proportional to 215,937.70, 298,089.59 and 139,494.07

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Solution

The fourth proportional to 215,937.70, 298,089.59 and 139,494.07 is: 192,563.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,937.70 : 298,089.59 = 139,494.07 : x
  2. Step 2: Convert to fraction form
    215,937.70/298,089.59 = 139,494.07/x
  3. Step 3: Cross multiply
    215,937.70x = 298,089.59 × 139,494.07
  4. Step 4: Simplify right side
    215,937.70x = 41,581,729,808.87
  5. Step 5: Solve for x
    x = 41,581,729,808.87/215,937.70
  6. Step 6: Final answer
    x = 192,563.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.