Home / 72,615.04-100,208.82-40,786

Finding the Fourth Proportional to 72,615.04, 100,208.82 and 40,786

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Solution

The fourth proportional to 72,615.04, 100,208.82 and 40,786 is: 56,284.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,615.04 : 100,208.82 = 40,786 : x
  2. Step 2: Convert to fraction form
    72,615.04/100,208.82 = 40,786/x
  3. Step 3: Cross multiply
    72,615.04x = 100,208.82 × 40,786
  4. Step 4: Simplify right side
    72,615.04x = 4,087,116,932.52
  5. Step 5: Solve for x
    x = 4,087,116,932.52/72,615.04
  6. Step 6: Final answer
    x = 56,284.72

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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.