Home / 115,242,563.21-158,934,230.42-81,685,668.51

Finding the Fourth Proportional to 115,242,563.21, 158,934,230.42 and 81,685,668.51

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Solution

The fourth proportional to 115,242,563.21, 158,934,230.42 and 81,685,668.51 is: 112,654,981.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,242,563.21 : 158,934,230.42 = 81,685,668.51 : x
  2. Step 2: Convert to fraction form
    115,242,563.21/158,934,230.42 = 81,685,668.51/x
  3. Step 3: Cross multiply
    115,242,563.21x = 158,934,230.42 × 81,685,668.51
  4. Step 4: Simplify right side
    115,242,563.21x = 12,982,648,860,571,650
  5. Step 5: Solve for x
    x = 12,982,648,860,571,650/115,242,563.21
  6. Step 6: Final answer
    x = 112,654,981.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.