Home / 72,018.10-99,390-40,187.53

Finding the Fourth Proportional to 72,018.10, 99,390 and 40,187.53

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Solution

The fourth proportional to 72,018.10, 99,390 and 40,187.53 is: 55,461.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,018.10 : 99,390 = 40,187.53 : x
  2. Step 2: Convert to fraction form
    72,018.10/99,390 = 40,187.53/x
  3. Step 3: Cross multiply
    72,018.10x = 99,390 × 40,187.53
  4. Step 4: Simplify right side
    72,018.10x = 3,994,238,606.70
  5. Step 5: Solve for x
    x = 3,994,238,606.70/72,018.10
  6. Step 6: Final answer
    x = 55,461.59

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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.