Home / 200,386.02-276,720.03-128,890.16

Finding the Fourth Proportional to 200,386.02, 276,720.03 and 128,890.16

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Solution

The fourth proportional to 200,386.02, 276,720.03 and 128,890.16 is: 177,988.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,386.02 : 276,720.03 = 128,890.16 : x
  2. Step 2: Convert to fraction form
    200,386.02/276,720.03 = 128,890.16/x
  3. Step 3: Cross multiply
    200,386.02x = 276,720.03 × 128,890.16
  4. Step 4: Simplify right side
    200,386.02x = 35,666,488,941.90
  5. Step 5: Solve for x
    x = 35,666,488,941.90/200,386.02
  6. Step 6: Final answer
    x = 177,988.91

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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.