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Finding the Fourth Proportional to 144,386.92, 216,431.34 and 69,393.88

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Solution

The fourth proportional to 144,386.92, 216,431.34 and 69,393.88 is: 104,019.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,386.92 : 216,431.34 = 69,393.88 : x
  2. Step 2: Convert to fraction form
    144,386.92/216,431.34 = 69,393.88/x
  3. Step 3: Cross multiply
    144,386.92x = 216,431.34 × 69,393.88
  4. Step 4: Simplify right side
    144,386.92x = 15,019,010,436.20
  5. Step 5: Solve for x
    x = 15,019,010,436.20/144,386.92
  6. Step 6: Final answer
    x = 104,019.19

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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.