Home / 128,969.58-193,455.79-39,013.21

Finding the Fourth Proportional to 128,969.58, 193,455.79 and 39,013.21

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Solution

The fourth proportional to 128,969.58, 193,455.79 and 39,013.21 is: 58,520.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,969.58 : 193,455.79 = 39,013.21 : x
  2. Step 2: Convert to fraction form
    128,969.58/193,455.79 = 39,013.21/x
  3. Step 3: Cross multiply
    128,969.58x = 193,455.79 × 39,013.21
  4. Step 4: Simplify right side
    128,969.58x = 7,547,331,360.99
  5. Step 5: Solve for x
    x = 7,547,331,360.99/128,969.58
  6. Step 6: Final answer
    x = 58,520.24

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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.