Home / 200,386.01-276,720.03-128,890.15

Finding the Fourth Proportional to 200,386.01, 276,720.03 and 128,890.15

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Solution

The fourth proportional to 200,386.01, 276,720.03 and 128,890.15 is: 177,988.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,386.01 : 276,720.03 = 128,890.15 : x
  2. Step 2: Convert to fraction form
    200,386.01/276,720.03 = 128,890.15/x
  3. Step 3: Cross multiply
    200,386.01x = 276,720.03 × 128,890.15
  4. Step 4: Simplify right side
    200,386.01x = 35,666,485,482.90
  5. Step 5: Solve for x
    x = 35,666,485,482.90/200,386.01
  6. Step 6: Final answer
    x = 177,988.90

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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.