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Finding the Fourth Proportional to 103,689.80, 155,490.69 and 43,745.15

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Solution

The fourth proportional to 103,689.80, 155,490.69 and 43,745.15 is: 65,599.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,689.80 : 155,490.69 = 43,745.15 : x
  2. Step 2: Convert to fraction form
    103,689.80/155,490.69 = 43,745.15/x
  3. Step 3: Cross multiply
    103,689.80x = 155,490.69 × 43,745.15
  4. Step 4: Simplify right side
    103,689.80x = 6,801,963,557.65
  5. Step 5: Solve for x
    x = 6,801,963,557.65/103,689.80
  6. Step 6: Final answer
    x = 65,599.16

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1.5x scale

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.