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Finding the Fourth Proportional to 228,706.88, 315,615.51 and 139,282.88

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Solution

The fourth proportional to 228,706.88, 315,615.51 and 139,282.88 is: 192,210.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,706.88 : 315,615.51 = 139,282.88 : x
  2. Step 2: Convert to fraction form
    228,706.88/315,615.51 = 139,282.88/x
  3. Step 3: Cross multiply
    228,706.88x = 315,615.51 × 139,282.88
  4. Step 4: Simplify right side
    228,706.88x = 43,959,835,627.39
  5. Step 5: Solve for x
    x = 43,959,835,627.39/228,706.88
  6. Step 6: Final answer
    x = 192,210.38

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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.