Home / 105,669.63-145,839-65,396.36

Finding the Fourth Proportional to 105,669.63, 145,839 and 65,396.36

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Solution

The fourth proportional to 105,669.63, 145,839 and 65,396.36 is: 90,256.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,669.63 : 145,839 = 65,396.36 : x
  2. Step 2: Convert to fraction form
    105,669.63/145,839 = 65,396.36/x
  3. Step 3: Cross multiply
    105,669.63x = 145,839 × 65,396.36
  4. Step 4: Simplify right side
    105,669.63x = 9,537,339,746.04
  5. Step 5: Solve for x
    x = 9,537,339,746.04/105,669.63
  6. Step 6: Final answer
    x = 90,256.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.