Home / 72,309.03-99,785.70-40,478.19

Finding the Fourth Proportional to 72,309.03, 99,785.70 and 40,478.19

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Solution

The fourth proportional to 72,309.03, 99,785.70 and 40,478.19 is: 55,859.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,309.03 : 99,785.70 = 40,478.19 : x
  2. Step 2: Convert to fraction form
    72,309.03/99,785.70 = 40,478.19/x
  3. Step 3: Cross multiply
    72,309.03x = 99,785.70 × 40,478.19
  4. Step 4: Simplify right side
    72,309.03x = 4,039,144,523.88
  5. Step 5: Solve for x
    x = 4,039,144,523.88/72,309.03
  6. Step 6: Final answer
    x = 55,859.48

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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.