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Finding the Fourth Proportional to 144,292.39, 216,482.31 and 69,391.28

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Solution

The fourth proportional to 144,292.39, 216,482.31 and 69,391.28 is: 104,107.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,292.39 : 216,482.31 = 69,391.28 : x
  2. Step 2: Convert to fraction form
    144,292.39/216,482.31 = 69,391.28/x
  3. Step 3: Cross multiply
    144,292.39x = 216,482.31 × 69,391.28
  4. Step 4: Simplify right side
    144,292.39x = 15,021,984,588.26
  5. Step 5: Solve for x
    x = 15,021,984,588.26/144,292.39
  6. Step 6: Final answer
    x = 104,107.95

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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.