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Finding the Fourth Proportional to 164,065.80, 245,580.30 and 128,814.60

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Solution

The fourth proportional to 164,065.80, 245,580.30 and 128,814.60 is: 192,814.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    164,065.80 : 245,580.30 = 128,814.60 : x
  2. Step 2: Convert to fraction form
    164,065.80/245,580.30 = 128,814.60/x
  3. Step 3: Cross multiply
    164,065.80x = 245,580.30 × 128,814.60
  4. Step 4: Simplify right side
    164,065.80x = 31,634,328,112.38
  5. Step 5: Solve for x
    x = 31,634,328,112.38/164,065.80
  6. Step 6: Final answer
    x = 192,814.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.