Home / 71,985.60-99,339.44-39,720.52

Finding the Fourth Proportional to 71,985.60, 99,339.44 and 39,720.52

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Solution

The fourth proportional to 71,985.60, 99,339.44 and 39,720.52 is: 54,813.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,985.60 : 99,339.44 = 39,720.52 : x
  2. Step 2: Convert to fraction form
    71,985.60/99,339.44 = 39,720.52/x
  3. Step 3: Cross multiply
    71,985.60x = 99,339.44 × 39,720.52
  4. Step 4: Simplify right side
    71,985.60x = 3,945,814,213.31
  5. Step 5: Solve for x
    x = 3,945,814,213.31/71,985.60
  6. Step 6: Final answer
    x = 54,813.94

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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.