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Finding the Fourth Proportional to 136,485.71, 188,351.02 and 79,159.01

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Solution

The fourth proportional to 136,485.71, 188,351.02 and 79,159.01 is: 109,239.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,485.71 : 188,351.02 = 79,159.01 : x
  2. Step 2: Convert to fraction form
    136,485.71/188,351.02 = 79,159.01/x
  3. Step 3: Cross multiply
    136,485.71x = 188,351.02 × 79,159.01
  4. Step 4: Simplify right side
    136,485.71x = 14,909,679,432.88
  5. Step 5: Solve for x
    x = 14,909,679,432.88/136,485.71
  6. Step 6: Final answer
    x = 109,239.86

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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.