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Finding the Fourth Proportional to 144,605.40, 216,908.10 and 74,621.40

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Solution

The fourth proportional to 144,605.40, 216,908.10 and 74,621.40 is: 111,932.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,605.40 : 216,908.10 = 74,621.40 : x
  2. Step 2: Convert to fraction form
    144,605.40/216,908.10 = 74,621.40/x
  3. Step 3: Cross multiply
    144,605.40x = 216,908.10 × 74,621.40
  4. Step 4: Simplify right side
    144,605.40x = 16,185,986,093.34
  5. Step 5: Solve for x
    x = 16,185,986,093.34/144,605.40
  6. Step 6: Final answer
    x = 111,932.10

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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.