Home / 213,635.63-320,485.35-78,689.45

Finding the Fourth Proportional to 213,635.63, 320,485.35 and 78,689.45

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Solution

The fourth proportional to 213,635.63, 320,485.35 and 78,689.45 is: 118,045.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,635.63 : 320,485.35 = 78,689.45 : x
  2. Step 2: Convert to fraction form
    213,635.63/320,485.35 = 78,689.45/x
  3. Step 3: Cross multiply
    213,635.63x = 320,485.35 × 78,689.45
  4. Step 4: Simplify right side
    213,635.63x = 25,218,815,924.56
  5. Step 5: Solve for x
    x = 25,218,815,924.56/213,635.63
  6. Step 6: Final answer
    x = 118,045.93

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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.