Home / 72,721.55-100,354.75-40,890.52

Finding the Fourth Proportional to 72,721.55, 100,354.75 and 40,890.52

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Solution

The fourth proportional to 72,721.55, 100,354.75 and 40,890.52 is: 56,428.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,721.55 : 100,354.75 = 40,890.52 : x
  2. Step 2: Convert to fraction form
    72,721.55/100,354.75 = 40,890.52/x
  3. Step 3: Cross multiply
    72,721.55x = 100,354.75 × 40,890.52
  4. Step 4: Simplify right side
    72,721.55x = 4,103,557,935.19
  5. Step 5: Solve for x
    x = 4,103,557,935.19/72,721.55
  6. Step 6: Final answer
    x = 56,428.36

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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.