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Finding the Fourth Proportional to 98,660, 136,164.16 and 55,648.32

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Solution

The fourth proportional to 98,660, 136,164.16 and 55,648.32 is: 76,802.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,660 : 136,164.16 = 55,648.32 : x
  2. Step 2: Convert to fraction form
    98,660/136,164.16 = 55,648.32/x
  3. Step 3: Cross multiply
    98,660x = 136,164.16 × 55,648.32
  4. Step 4: Simplify right side
    98,660x = 7,577,306,748.21
  5. Step 5: Solve for x
    x = 7,577,306,748.21/98,660
  6. Step 6: Final answer
    x = 76,802.22

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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.