Home / 71,985.10-99,338.76-39,720.01

Finding the Fourth Proportional to 71,985.10, 99,338.76 and 39,720.01

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Solution

The fourth proportional to 71,985.10, 99,338.76 and 39,720.01 is: 54,813.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,985.10 : 99,338.76 = 39,720.01 : x
  2. Step 2: Convert to fraction form
    71,985.10/99,338.76 = 39,720.01/x
  3. Step 3: Cross multiply
    71,985.10x = 99,338.76 × 39,720.01
  4. Step 4: Simplify right side
    71,985.10x = 3,945,736,540.59
  5. Step 5: Solve for x
    x = 3,945,736,540.59/71,985.10
  6. Step 6: Final answer
    x = 54,813.24

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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.