Home / 153,971.21-212,684.27-123,869.90

Finding the Fourth Proportional to 153,971.21, 212,684.27 and 123,869.90

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Solution

The fourth proportional to 153,971.21, 212,684.27 and 123,869.90 is: 171,104.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,971.21 : 212,684.27 = 123,869.90 : x
  2. Step 2: Convert to fraction form
    153,971.21/212,684.27 = 123,869.90/x
  3. Step 3: Cross multiply
    153,971.21x = 212,684.27 × 123,869.90
  4. Step 4: Simplify right side
    153,971.21x = 26,345,177,573.70
  5. Step 5: Solve for x
    x = 26,345,177,573.70/153,971.21
  6. Step 6: Final answer
    x = 171,104.57

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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.