Home / 213,963.23-321,004.85-85,969.40

Finding the Fourth Proportional to 213,963.23, 321,004.85 and 85,969.40

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Solution

The fourth proportional to 213,963.23, 321,004.85 and 85,969.40 is: 128,978.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,963.23 : 321,004.85 = 85,969.40 : x
  2. Step 2: Convert to fraction form
    213,963.23/321,004.85 = 85,969.40/x
  3. Step 3: Cross multiply
    213,963.23x = 321,004.85 × 85,969.40
  4. Step 4: Simplify right side
    213,963.23x = 27,596,592,316.72
  5. Step 5: Solve for x
    x = 27,596,592,316.72/213,963.23
  6. Step 6: Final answer
    x = 128,978.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.