Home / 128,638.13-193,075.65-65,503.38

Finding the Fourth Proportional to 128,638.13, 193,075.65 and 65,503.38

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Solution

The fourth proportional to 128,638.13, 193,075.65 and 65,503.38 is: 98,315.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,638.13 : 193,075.65 = 65,503.38 : x
  2. Step 2: Convert to fraction form
    128,638.13/193,075.65 = 65,503.38/x
  3. Step 3: Cross multiply
    128,638.13x = 193,075.65 × 65,503.38
  4. Step 4: Simplify right side
    128,638.13x = 12,647,108,394.73
  5. Step 5: Solve for x
    x = 12,647,108,394.73/128,638.13
  6. Step 6: Final answer
    x = 98,315.40

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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.