Home / 138,288.16-190,868.72-90,513.68

Finding the Fourth Proportional to 138,288.16, 190,868.72 and 90,513.68

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Solution

The fourth proportional to 138,288.16, 190,868.72 and 90,513.68 is: 124,929.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,288.16 : 190,868.72 = 90,513.68 : x
  2. Step 2: Convert to fraction form
    138,288.16/190,868.72 = 90,513.68/x
  3. Step 3: Cross multiply
    138,288.16x = 190,868.72 × 90,513.68
  4. Step 4: Simplify right side
    138,288.16x = 17,276,230,244.09
  5. Step 5: Solve for x
    x = 17,276,230,244.09/138,288.16
  6. Step 6: Final answer
    x = 124,929.21

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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.