Home / 81,971,709.60-122,957,564.40-21,387,435.60

Finding the Fourth Proportional to 81,971,709.60, 122,957,564.40 and 21,387,435.60

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Solution

The fourth proportional to 81,971,709.60, 122,957,564.40 and 21,387,435.60 is: 32,081,153.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,971,709.60 : 122,957,564.40 = 21,387,435.60 : x
  2. Step 2: Convert to fraction form
    81,971,709.60/122,957,564.40 = 21,387,435.60/x
  3. Step 3: Cross multiply
    81,971,709.60x = 122,957,564.40 × 21,387,435.60
  4. Step 4: Simplify right side
    81,971,709.60x = 2,629,746,990,137,853
  5. Step 5: Solve for x
    x = 2,629,746,990,137,853/81,971,709.60
  6. Step 6: Final answer
    x = 32,081,153.40

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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.