Home / 100,211.60-138,292.04-54,890.34

Finding the Fourth Proportional to 100,211.60, 138,292.04 and 54,890.34

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Solution

The fourth proportional to 100,211.60, 138,292.04 and 54,890.34 is: 75,748.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,211.60 : 138,292.04 = 54,890.34 : x
  2. Step 2: Convert to fraction form
    100,211.60/138,292.04 = 54,890.34/x
  3. Step 3: Cross multiply
    100,211.60x = 138,292.04 × 54,890.34
  4. Step 4: Simplify right side
    100,211.60x = 7,590,897,094.89
  5. Step 5: Solve for x
    x = 7,590,897,094.89/100,211.60
  6. Step 6: Final answer
    x = 75,748.69

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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.