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Finding the Fourth Proportional to 190,254.80, 285,425.40 and 111,328.40

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Solution

The fourth proportional to 190,254.80, 285,425.40 and 111,328.40 is: 167,017.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,254.80 : 285,425.40 = 111,328.40 : x
  2. Step 2: Convert to fraction form
    190,254.80/285,425.40 = 111,328.40/x
  3. Step 3: Cross multiply
    190,254.80x = 285,425.40 × 111,328.40
  4. Step 4: Simplify right side
    190,254.80x = 31,775,953,101.36
  5. Step 5: Solve for x
    x = 31,775,953,101.36/190,254.80
  6. Step 6: Final answer
    x = 167,017.88

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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.