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Finding the Fourth Proportional to 128,958.80, 193,408.80 and 48,980.16

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Solution

The fourth proportional to 128,958.80, 193,408.80 and 48,980.16 is: 73,459.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,958.80 : 193,408.80 = 48,980.16 : x
  2. Step 2: Convert to fraction form
    128,958.80/193,408.80 = 48,980.16/x
  3. Step 3: Cross multiply
    128,958.80x = 193,408.80 × 48,980.16
  4. Step 4: Simplify right side
    128,958.80x = 9,473,193,969.41
  5. Step 5: Solve for x
    x = 9,473,193,969.41/128,958.80
  6. Step 6: Final answer
    x = 73,459.07

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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.