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Finding the Fourth Proportional to 228,697.50, 315,602.55 and 139,273.50

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Solution

The fourth proportional to 228,697.50, 315,602.55 and 139,273.50 is: 192,197.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,697.50 : 315,602.55 = 139,273.50 : x
  2. Step 2: Convert to fraction form
    228,697.50/315,602.55 = 139,273.50/x
  3. Step 3: Cross multiply
    228,697.50x = 315,602.55 × 139,273.50
  4. Step 4: Simplify right side
    228,697.50x = 43,955,071,747.43
  5. Step 5: Solve for x
    x = 43,955,071,747.43/228,697.50
  6. Step 6: Final answer
    x = 192,197.43

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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.