Home / 85,461,922.86-128,193,044.67-20,765,782.68

Finding the Fourth Proportional to 85,461,922.86, 128,193,044.67 and 20,765,782.68

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Solution

The fourth proportional to 85,461,922.86, 128,193,044.67 and 20,765,782.68 is: 31,148,712.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,461,922.86 : 128,193,044.67 = 20,765,782.68 : x
  2. Step 2: Convert to fraction form
    85,461,922.86/128,193,044.67 = 20,765,782.68/x
  3. Step 3: Cross multiply
    85,461,922.86x = 128,193,044.67 × 20,765,782.68
  4. Step 4: Simplify right side
    85,461,922.86x = 2,662,028,906,704,752.50
  5. Step 5: Solve for x
    x = 2,662,028,906,704,752.50/85,461,922.86
  6. Step 6: Final answer
    x = 31,148,712.99

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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.