Home / 72,703.72-100,321.38-40,866.28

Finding the Fourth Proportional to 72,703.72, 100,321.38 and 40,866.28

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Solution

The fourth proportional to 72,703.72, 100,321.38 and 40,866.28 is: 56,389.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,703.72 : 100,321.38 = 40,866.28 : x
  2. Step 2: Convert to fraction form
    72,703.72/100,321.38 = 40,866.28/x
  3. Step 3: Cross multiply
    72,703.72x = 100,321.38 × 40,866.28
  4. Step 4: Simplify right side
    72,703.72x = 4,099,761,605.07
  5. Step 5: Solve for x
    x = 4,099,761,605.07/72,703.72
  6. Step 6: Final answer
    x = 56,389.98

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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.