Home / 251,831.40-347,520-137,112.31

Finding the Fourth Proportional to 251,831.40, 347,520 and 137,112.31

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Solution

The fourth proportional to 251,831.40, 347,520 and 137,112.31 is: 189,211.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,831.40 : 347,520 = 137,112.31 : x
  2. Step 2: Convert to fraction form
    251,831.40/347,520 = 137,112.31/x
  3. Step 3: Cross multiply
    251,831.40x = 347,520 × 137,112.31
  4. Step 4: Simplify right side
    251,831.40x = 47,649,269,971.20
  5. Step 5: Solve for x
    x = 47,649,269,971.20/251,831.40
  6. Step 6: Final answer
    x = 189,211.00

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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.