Home / 228,742.06-315,664.08-128,140.06

Finding the Fourth Proportional to 228,742.06, 315,664.08 and 128,140.06

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Solution

The fourth proportional to 228,742.06, 315,664.08 and 128,140.06 is: 176,833.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,742.06 : 315,664.08 = 128,140.06 : x
  2. Step 2: Convert to fraction form
    228,742.06/315,664.08 = 128,140.06/x
  3. Step 3: Cross multiply
    228,742.06x = 315,664.08 × 128,140.06
  4. Step 4: Simplify right side
    228,742.06x = 40,449,214,151.04
  5. Step 5: Solve for x
    x = 40,449,214,151.04/228,742.06
  6. Step 6: Final answer
    x = 176,833.30

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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.