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Finding the Fourth Proportional to 228,756.54, 315,608.41 and 138,078.06

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Solution

The fourth proportional to 228,756.54, 315,608.41 and 138,078.06 is: 190,502.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,756.54 : 315,608.41 = 138,078.06 : x
  2. Step 2: Convert to fraction form
    228,756.54/315,608.41 = 138,078.06/x
  3. Step 3: Cross multiply
    228,756.54x = 315,608.41 × 138,078.06
  4. Step 4: Simplify right side
    228,756.54x = 43,578,596,972.48
  5. Step 5: Solve for x
    x = 43,578,596,972.48/228,756.54
  6. Step 6: Final answer
    x = 190,502.08

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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.