Home / 129,038,978.40-193,558,467.60-81,263,234.40

Finding the Fourth Proportional to 129,038,978.40, 193,558,467.60 and 81,263,234.40

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Solution

The fourth proportional to 129,038,978.40, 193,558,467.60 and 81,263,234.40 is: 121,894,851.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,038,978.40 : 193,558,467.60 = 81,263,234.40 : x
  2. Step 2: Convert to fraction form
    129,038,978.40/193,558,467.60 = 81,263,234.40/x
  3. Step 3: Cross multiply
    129,038,978.40x = 193,558,467.60 × 81,263,234.40
  4. Step 4: Simplify right side
    129,038,978.40x = 15,729,187,122,683,606
  5. Step 5: Solve for x
    x = 15,729,187,122,683,606/129,038,978.40
  6. Step 6: Final answer
    x = 121,894,851.60

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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.