Home / 72,431,666.40-108,647,499.60-18,578,978.40

Finding the Fourth Proportional to 72,431,666.40, 108,647,499.60 and 18,578,978.40

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Solution

The fourth proportional to 72,431,666.40, 108,647,499.60 and 18,578,978.40 is: 27,868,467.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,431,666.40 : 108,647,499.60 = 18,578,978.40 : x
  2. Step 2: Convert to fraction form
    72,431,666.40/108,647,499.60 = 18,578,978.40/x
  3. Step 3: Cross multiply
    72,431,666.40x = 108,647,499.60 × 18,578,978.40
  4. Step 4: Simplify right side
    72,431,666.40x = 2,018,559,548,282,408.25
  5. Step 5: Solve for x
    x = 2,018,559,548,282,408.25/72,431,666.40
  6. Step 6: Final answer
    x = 27,868,467.60

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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.