Home / 74,005.21-111,018.75-21,407.86

Finding the Fourth Proportional to 74,005.21, 111,018.75 and 21,407.86

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Solution

The fourth proportional to 74,005.21, 111,018.75 and 21,407.86 is: 32,114.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,005.21 : 111,018.75 = 21,407.86 : x
  2. Step 2: Convert to fraction form
    74,005.21/111,018.75 = 21,407.86/x
  3. Step 3: Cross multiply
    74,005.21x = 111,018.75 × 21,407.86
  4. Step 4: Simplify right side
    74,005.21x = 2,376,673,857.38
  5. Step 5: Solve for x
    x = 2,376,673,857.38/74,005.21
  6. Step 6: Final answer
    x = 32,114.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.