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Finding the Fourth Proportional to 128,295.88, 192,410.10 and 38,317.24

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Solution

The fourth proportional to 128,295.88, 192,410.10 and 38,317.24 is: 57,465.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,295.88 : 192,410.10 = 38,317.24 : x
  2. Step 2: Convert to fraction form
    128,295.88/192,410.10 = 38,317.24/x
  3. Step 3: Cross multiply
    128,295.88x = 192,410.10 × 38,317.24
  4. Step 4: Simplify right side
    128,295.88x = 7,372,623,980.12
  5. Step 5: Solve for x
    x = 7,372,623,980.12/128,295.88
  6. Step 6: Final answer
    x = 57,465.79

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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.