Home / 128,191.89-176,907.60-71,603.40

Finding the Fourth Proportional to 128,191.89, 176,907.60 and 71,603.40

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Solution

The fourth proportional to 128,191.89, 176,907.60 and 71,603.40 is: 98,814.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,191.89 : 176,907.60 = 71,603.40 : x
  2. Step 2: Convert to fraction form
    128,191.89/176,907.60 = 71,603.40/x
  3. Step 3: Cross multiply
    128,191.89x = 176,907.60 × 71,603.40
  4. Step 4: Simplify right side
    128,191.89x = 12,667,185,645.84
  5. Step 5: Solve for x
    x = 12,667,185,645.84/128,191.89
  6. Step 6: Final answer
    x = 98,814.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.