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Finding the Fourth Proportional to 105,661.65, 145,869.21 and 71,850.63

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Solution

The fourth proportional to 105,661.65, 145,869.21 and 71,850.63 is: 99,192.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,661.65 : 145,869.21 = 71,850.63 : x
  2. Step 2: Convert to fraction form
    105,661.65/145,869.21 = 71,850.63/x
  3. Step 3: Cross multiply
    105,661.65x = 145,869.21 × 71,850.63
  4. Step 4: Simplify right side
    105,661.65x = 10,480,794,636.10
  5. Step 5: Solve for x
    x = 10,480,794,636.10/105,661.65
  6. Step 6: Final answer
    x = 99,192.04

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1.5x scale

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.