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Finding the Fourth Proportional to 145,840.63, 201,260.20 and 78,772.63

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Solution

The fourth proportional to 145,840.63, 201,260.20 and 78,772.63 is: 108,706.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,840.63 : 201,260.20 = 78,772.63 : x
  2. Step 2: Convert to fraction form
    145,840.63/201,260.20 = 78,772.63/x
  3. Step 3: Cross multiply
    145,840.63x = 201,260.20 × 78,772.63
  4. Step 4: Simplify right side
    145,840.63x = 15,853,795,268.33
  5. Step 5: Solve for x
    x = 15,853,795,268.33/145,840.63
  6. Step 6: Final answer
    x = 108,706.30

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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.