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Finding the Fourth Proportional to 74,603.12, 111,904.68 and 71,363.64

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Solution

The fourth proportional to 74,603.12, 111,904.68 and 71,363.64 is: 107,045.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,603.12 : 111,904.68 = 71,363.64 : x
  2. Step 2: Convert to fraction form
    74,603.12/111,904.68 = 71,363.64/x
  3. Step 3: Cross multiply
    74,603.12x = 111,904.68 × 71,363.64
  4. Step 4: Simplify right side
    74,603.12x = 7,985,925,297.84
  5. Step 5: Solve for x
    x = 7,985,925,297.84/74,603.12
  6. Step 6: Final answer
    x = 107,045.46

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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.