Home / 113,788.78-170,550.12-85,618.40

Finding the Fourth Proportional to 113,788.78, 170,550.12 and 85,618.40

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Solution

The fourth proportional to 113,788.78, 170,550.12 and 85,618.40 is: 128,327.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,788.78 : 170,550.12 = 85,618.40 : x
  2. Step 2: Convert to fraction form
    113,788.78/170,550.12 = 85,618.40/x
  3. Step 3: Cross multiply
    113,788.78x = 170,550.12 × 85,618.40
  4. Step 4: Simplify right side
    113,788.78x = 14,602,228,394.21
  5. Step 5: Solve for x
    x = 14,602,228,394.21/113,788.78
  6. Step 6: Final answer
    x = 128,327.49

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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.