Home / 189,688.41-261,465.95-128,415.29

Finding the Fourth Proportional to 189,688.41, 261,465.95 and 128,415.29

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Solution

The fourth proportional to 189,688.41, 261,465.95 and 128,415.29 is: 177,007.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,688.41 : 261,465.95 = 128,415.29 : x
  2. Step 2: Convert to fraction form
    189,688.41/261,465.95 = 128,415.29/x
  3. Step 3: Cross multiply
    189,688.41x = 261,465.95 × 128,415.29
  4. Step 4: Simplify right side
    189,688.41x = 33,576,223,844.97
  5. Step 5: Solve for x
    x = 33,576,223,844.97/189,688.41
  6. Step 6: Final answer
    x = 177,007.25

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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.