Home / 72,069.75-99,455.45-39,804.75

Finding the Fourth Proportional to 72,069.75, 99,455.45 and 39,804.75

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Solution

The fourth proportional to 72,069.75, 99,455.45 and 39,804.75 is: 54,930.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,069.75 : 99,455.45 = 39,804.75 : x
  2. Step 2: Convert to fraction form
    72,069.75/99,455.45 = 39,804.75/x
  3. Step 3: Cross multiply
    72,069.75x = 99,455.45 × 39,804.75
  4. Step 4: Simplify right side
    72,069.75x = 3,958,799,124.36
  5. Step 5: Solve for x
    x = 3,958,799,124.36/72,069.75
  6. Step 6: Final answer
    x = 54,930.11

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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.