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Finding the Fourth Proportional to 228,505.86, 315,240.30 and 137,810.22

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Solution

The fourth proportional to 228,505.86, 315,240.30 and 137,810.22 is: 190,119.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,505.86 : 315,240.30 = 137,810.22 : x
  2. Step 2: Convert to fraction form
    228,505.86/315,240.30 = 137,810.22/x
  3. Step 3: Cross multiply
    228,505.86x = 315,240.30 × 137,810.22
  4. Step 4: Simplify right side
    228,505.86x = 43,443,335,095.87
  5. Step 5: Solve for x
    x = 43,443,335,095.87/228,505.86
  6. Step 6: Final answer
    x = 190,119.13

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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.