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Finding the Fourth Proportional to 137,077.58, 205,047.74 and 128,679.50

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Solution

The fourth proportional to 137,077.58, 205,047.74 and 128,679.50 is: 192,485.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,077.58 : 205,047.74 = 128,679.50 : x
  2. Step 2: Convert to fraction form
    137,077.58/205,047.74 = 128,679.50/x
  3. Step 3: Cross multiply
    137,077.58x = 205,047.74 × 128,679.50
  4. Step 4: Simplify right side
    137,077.58x = 26,385,440,659.33
  5. Step 5: Solve for x
    x = 26,385,440,659.33/137,077.58
  6. Step 6: Final answer
    x = 192,485.46

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1.5x scale

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.