Home / 155,013.90-213,921.39-87,045.60

Finding the Fourth Proportional to 155,013.90, 213,921.39 and 87,045.60

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Solution

The fourth proportional to 155,013.90, 213,921.39 and 87,045.60 is: 120,124.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,013.90 : 213,921.39 = 87,045.60 : x
  2. Step 2: Convert to fraction form
    155,013.90/213,921.39 = 87,045.60/x
  3. Step 3: Cross multiply
    155,013.90x = 213,921.39 × 87,045.60
  4. Step 4: Simplify right side
    155,013.90x = 18,620,915,745.38
  5. Step 5: Solve for x
    x = 18,620,915,745.38/155,013.90
  6. Step 6: Final answer
    x = 120,124.17

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1.5x scale

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.