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Finding the Fourth Proportional to 98,808.36, 136,354.56 and 53,485.44

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Solution

The fourth proportional to 98,808.36, 136,354.56 and 53,485.44 is: 73,809.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,808.36 : 136,354.56 = 53,485.44 : x
  2. Step 2: Convert to fraction form
    98,808.36/136,354.56 = 53,485.44/x
  3. Step 3: Cross multiply
    98,808.36x = 136,354.56 × 53,485.44
  4. Step 4: Simplify right side
    98,808.36x = 7,292,983,637.61
  5. Step 5: Solve for x
    x = 7,292,983,637.61/98,808.36
  6. Step 6: Final answer
    x = 73,809.38

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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.