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Finding the Fourth Proportional to 145,079.80, 217,619.70 and 82,756.60

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Solution

The fourth proportional to 145,079.80, 217,619.70 and 82,756.60 is: 124,134.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,079.80 : 217,619.70 = 82,756.60 : x
  2. Step 2: Convert to fraction form
    145,079.80/217,619.70 = 82,756.60/x
  3. Step 3: Cross multiply
    145,079.80x = 217,619.70 × 82,756.60
  4. Step 4: Simplify right side
    145,079.80x = 18,009,466,465.02
  5. Step 5: Solve for x
    x = 18,009,466,465.02/145,079.80
  6. Step 6: Final answer
    x = 124,134.90

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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.