Home / 128,125.77-192,207.03-39,386.72

Finding the Fourth Proportional to 128,125.77, 192,207.03 and 39,386.72

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Solution

The fourth proportional to 128,125.77, 192,207.03 and 39,386.72 is: 59,085.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,125.77 : 192,207.03 = 39,386.72 : x
  2. Step 2: Convert to fraction form
    128,125.77/192,207.03 = 39,386.72/x
  3. Step 3: Cross multiply
    128,125.77x = 192,207.03 × 39,386.72
  4. Step 4: Simplify right side
    128,125.77x = 7,570,404,805.46
  5. Step 5: Solve for x
    x = 7,570,404,805.46/128,125.77
  6. Step 6: Final answer
    x = 59,085.73

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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.