Home / 113,435.40-170,217.90-78,400.20

Finding the Fourth Proportional to 113,435.40, 170,217.90 and 78,400.20

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Solution

The fourth proportional to 113,435.40, 170,217.90 and 78,400.20 is: 117,645.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,435.40 : 170,217.90 = 78,400.20 : x
  2. Step 2: Convert to fraction form
    113,435.40/170,217.90 = 78,400.20/x
  3. Step 3: Cross multiply
    113,435.40x = 170,217.90 × 78,400.20
  4. Step 4: Simplify right side
    113,435.40x = 13,345,117,403.58
  5. Step 5: Solve for x
    x = 13,345,117,403.58/113,435.40
  6. Step 6: Final answer
    x = 117,645.09

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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.