Home / 390,023,221.60-585,121,437.60-131,231,137.60

Finding the Fourth Proportional to 390,023,221.60, 585,121,437.60 and 131,231,137.60

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Solution

The fourth proportional to 390,023,221.60, 585,121,437.60 and 131,231,137.60 is: 196,875,846.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,023,221.60 : 585,121,437.60 = 131,231,137.60 : x
  2. Step 2: Convert to fraction form
    390,023,221.60/585,121,437.60 = 131,231,137.60/x
  3. Step 3: Cross multiply
    390,023,221.60x = 585,121,437.60 × 131,231,137.60
  4. Step 4: Simplify right side
    390,023,221.60x = 76,786,151,890,395,408
  5. Step 5: Solve for x
    x = 76,786,151,890,395,408/390,023,221.60
  6. Step 6: Final answer
    x = 196,875,846.46

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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.