Home / 116,645.30-161,009.43-78,392.06

Finding the Fourth Proportional to 116,645.30, 161,009.43 and 78,392.06

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Solution

The fourth proportional to 116,645.30, 161,009.43 and 78,392.06 is: 108,207.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,645.30 : 161,009.43 = 78,392.06 : x
  2. Step 2: Convert to fraction form
    116,645.30/161,009.43 = 78,392.06/x
  3. Step 3: Cross multiply
    116,645.30x = 161,009.43 × 78,392.06
  4. Step 4: Simplify right side
    116,645.30x = 12,621,860,897.13
  5. Step 5: Solve for x
    x = 12,621,860,897.13/116,645.30
  6. Step 6: Final answer
    x = 108,207.20

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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.