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Finding the Fourth Proportional to 209,030.80, 313,315.80 and 115,603.60

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Solution

The fourth proportional to 209,030.80, 313,315.80 and 115,603.60 is: 173,277.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,030.80 : 313,315.80 = 115,603.60 : x
  2. Step 2: Convert to fraction form
    209,030.80/313,315.80 = 115,603.60/x
  3. Step 3: Cross multiply
    209,030.80x = 313,315.80 × 115,603.60
  4. Step 4: Simplify right side
    209,030.80x = 36,220,434,416.88
  5. Step 5: Solve for x
    x = 36,220,434,416.88/209,030.80
  6. Step 6: Final answer
    x = 173,277.98

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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.