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Finding the Fourth Proportional to 98,701.63, 136,208.65 and 53,379.61

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Solution

The fourth proportional to 98,701.63, 136,208.65 and 53,379.61 is: 73,664.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,701.63 : 136,208.65 = 53,379.61 : x
  2. Step 2: Convert to fraction form
    98,701.63/136,208.65 = 53,379.61/x
  3. Step 3: Cross multiply
    98,701.63x = 136,208.65 × 53,379.61
  4. Step 4: Simplify right side
    98,701.63x = 7,270,764,615.63
  5. Step 5: Solve for x
    x = 7,270,764,615.63/98,701.63
  6. Step 6: Final answer
    x = 73,664.08

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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.