Home / 138,284.16-190,863.18-90,509.69

Finding the Fourth Proportional to 138,284.16, 190,863.18 and 90,509.69

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Solution

The fourth proportional to 138,284.16, 190,863.18 and 90,509.69 is: 124,923.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,284.16 : 190,863.18 = 90,509.69 : x
  2. Step 2: Convert to fraction form
    138,284.16/190,863.18 = 90,509.69/x
  3. Step 3: Cross multiply
    138,284.16x = 190,863.18 × 90,509.69
  4. Step 4: Simplify right side
    138,284.16x = 17,274,966,299.90
  5. Step 5: Solve for x
    x = 17,274,966,299.90/138,284.16
  6. Step 6: Final answer
    x = 124,923.68

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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.