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Finding the Fourth Proportional to 70,603.03, 105,939.17 and 31,113.10

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Solution

The fourth proportional to 70,603.03, 105,939.17 and 31,113.10 is: 46,684.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,603.03 : 105,939.17 = 31,113.10 : x
  2. Step 2: Convert to fraction form
    70,603.03/105,939.17 = 31,113.10/x
  3. Step 3: Cross multiply
    70,603.03x = 105,939.17 × 31,113.10
  4. Step 4: Simplify right side
    70,603.03x = 3,296,095,990.13
  5. Step 5: Solve for x
    x = 3,296,095,990.13/70,603.03
  6. Step 6: Final answer
    x = 46,684.91

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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.