Home / 72,257.11-99,710.80-40,428.06

Finding the Fourth Proportional to 72,257.11, 99,710.80 and 40,428.06

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Solution

The fourth proportional to 72,257.11, 99,710.80 and 40,428.06 is: 55,788.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,257.11 : 99,710.80 = 40,428.06 : x
  2. Step 2: Convert to fraction form
    72,257.11/99,710.80 = 40,428.06/x
  3. Step 3: Cross multiply
    72,257.11x = 99,710.80 × 40,428.06
  4. Step 4: Simplify right side
    72,257.11x = 4,031,114,290.94
  5. Step 5: Solve for x
    x = 4,031,114,290.94/72,257.11
  6. Step 6: Final answer
    x = 55,788.48

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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.