Home / 129,447,002.40-194,170,503.60-78,652,096.80

Finding the Fourth Proportional to 129,447,002.40, 194,170,503.60 and 78,652,096.80

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Solution

The fourth proportional to 129,447,002.40, 194,170,503.60 and 78,652,096.80 is: 117,978,145.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,447,002.40 : 194,170,503.60 = 78,652,096.80 : x
  2. Step 2: Convert to fraction form
    129,447,002.40/194,170,503.60 = 78,652,096.80/x
  3. Step 3: Cross multiply
    129,447,002.40x = 194,170,503.60 × 78,652,096.80
  4. Step 4: Simplify right side
    129,447,002.40x = 15,271,917,244,851,948
  5. Step 5: Solve for x
    x = 15,271,917,244,851,948/129,447,002.40
  6. Step 6: Final answer
    x = 117,978,145.20

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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.