Home / 72,209.69-99,653.97-40,378.58

Finding the Fourth Proportional to 72,209.69, 99,653.97 and 40,378.58

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Solution

The fourth proportional to 72,209.69, 99,653.97 and 40,378.58 is: 55,725.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,209.69 : 99,653.97 = 40,378.58 : x
  2. Step 2: Convert to fraction form
    72,209.69/99,653.97 = 40,378.58/x
  3. Step 3: Cross multiply
    72,209.69x = 99,653.97 × 40,378.58
  4. Step 4: Simplify right side
    72,209.69x = 4,023,885,799.96
  5. Step 5: Solve for x
    x = 4,023,885,799.96/72,209.69
  6. Step 6: Final answer
    x = 55,725.01

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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.