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Finding the Fourth Proportional to 149,056.65, 205,679.50 and 100,763.65

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Solution

The fourth proportional to 149,056.65, 205,679.50 and 100,763.65 is: 139,041.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,056.65 : 205,679.50 = 100,763.65 : x
  2. Step 2: Convert to fraction form
    149,056.65/205,679.50 = 100,763.65/x
  3. Step 3: Cross multiply
    149,056.65x = 205,679.50 × 100,763.65
  4. Step 4: Simplify right side
    149,056.65x = 20,725,017,150.18
  5. Step 5: Solve for x
    x = 20,725,017,150.18/149,056.65
  6. Step 6: Final answer
    x = 139,041.21

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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.