Home / 105,638.78-145,785.25-57,892.14

Finding the Fourth Proportional to 105,638.78, 145,785.25 and 57,892.14

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Solution

The fourth proportional to 105,638.78, 145,785.25 and 57,892.14 is: 79,893.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,638.78 : 145,785.25 = 57,892.14 : x
  2. Step 2: Convert to fraction form
    105,638.78/145,785.25 = 57,892.14/x
  3. Step 3: Cross multiply
    105,638.78x = 145,785.25 × 57,892.14
  4. Step 4: Simplify right side
    105,638.78x = 8,439,819,518.74
  5. Step 5: Solve for x
    x = 8,439,819,518.74/105,638.78
  6. Step 6: Final answer
    x = 79,893.19

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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.