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Finding the Fourth Proportional to 139,220.10, 208,830.15 and 34,040.10

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Solution

The fourth proportional to 139,220.10, 208,830.15 and 34,040.10 is: 51,060.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,220.10 : 208,830.15 = 34,040.10 : x
  2. Step 2: Convert to fraction form
    139,220.10/208,830.15 = 34,040.10/x
  3. Step 3: Cross multiply
    139,220.10x = 208,830.15 × 34,040.10
  4. Step 4: Simplify right side
    139,220.10x = 7,108,599,189.02
  5. Step 5: Solve for x
    x = 7,108,599,189.02/139,220.10
  6. Step 6: Final answer
    x = 51,060.15

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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.