Home / 199,915.32-275,856.48-128,392.14

Finding the Fourth Proportional to 199,915.32, 275,856.48 and 128,392.14

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Solution

The fourth proportional to 199,915.32, 275,856.48 and 128,392.14 is: 177,164.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,915.32 : 275,856.48 = 128,392.14 : x
  2. Step 2: Convert to fraction form
    199,915.32/275,856.48 = 128,392.14/x
  3. Step 3: Cross multiply
    199,915.32x = 275,856.48 × 128,392.14
  4. Step 4: Simplify right side
    199,915.32x = 35,417,803,800.07
  5. Step 5: Solve for x
    x = 35,417,803,800.07/199,915.32
  6. Step 6: Final answer
    x = 177,164.03

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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.