Home / 72,040.10-99,415.38-40,208.98

Finding the Fourth Proportional to 72,040.10, 99,415.38 and 40,208.98

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Solution

The fourth proportional to 72,040.10, 99,415.38 and 40,208.98 is: 55,488.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,040.10 : 99,415.38 = 40,208.98 : x
  2. Step 2: Convert to fraction form
    72,040.10/99,415.38 = 40,208.98/x
  3. Step 3: Cross multiply
    72,040.10x = 99,415.38 × 40,208.98
  4. Step 4: Simplify right side
    72,040.10x = 3,997,391,026.11
  5. Step 5: Solve for x
    x = 3,997,391,026.11/72,040.10
  6. Step 6: Final answer
    x = 55,488.42

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1.5x scale

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.