Home / 153,749.03-212,168.85-90,129.20

Finding the Fourth Proportional to 153,749.03, 212,168.85 and 90,129.20

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Solution

The fourth proportional to 153,749.03, 212,168.85 and 90,129.20 is: 124,375.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,749.03 : 212,168.85 = 90,129.20 : x
  2. Step 2: Convert to fraction form
    153,749.03/212,168.85 = 90,129.20/x
  3. Step 3: Cross multiply
    153,749.03x = 212,168.85 × 90,129.20
  4. Step 4: Simplify right side
    153,749.03x = 19,122,608,715.42
  5. Step 5: Solve for x
    x = 19,122,608,715.42/153,749.03
  6. Step 6: Final answer
    x = 124,375.48

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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.