Home / 228,741.06-315,662.70-128,139.06

Finding the Fourth Proportional to 228,741.06, 315,662.70 and 128,139.06

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Solution

The fourth proportional to 228,741.06, 315,662.70 and 128,139.06 is: 176,831.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,741.06 : 315,662.70 = 128,139.06 : x
  2. Step 2: Convert to fraction form
    228,741.06/315,662.70 = 128,139.06/x
  3. Step 3: Cross multiply
    228,741.06x = 315,662.70 × 128,139.06
  4. Step 4: Simplify right side
    228,741.06x = 40,448,721,655.06
  5. Step 5: Solve for x
    x = 40,448,721,655.06/228,741.06
  6. Step 6: Final answer
    x = 176,831.92

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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.