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Finding the Fourth Proportional to 149,050.80, 205,689.60 and 85,388.40

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Solution

The fourth proportional to 149,050.80, 205,689.60 and 85,388.40 is: 117,835.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,050.80 : 205,689.60 = 85,388.40 : x
  2. Step 2: Convert to fraction form
    149,050.80/205,689.60 = 85,388.40/x
  3. Step 3: Cross multiply
    149,050.80x = 205,689.60 × 85,388.40
  4. Step 4: Simplify right side
    149,050.80x = 17,563,505,840.64
  5. Step 5: Solve for x
    x = 17,563,505,840.64/149,050.80
  6. Step 6: Final answer
    x = 117,835.70

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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.