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Finding the Fourth Proportional to 103,959.10, 155,610.60 and 100,678.60

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Solution

The fourth proportional to 103,959.10, 155,610.60 and 100,678.60 is: 150,700.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,959.10 : 155,610.60 = 100,678.60 : x
  2. Step 2: Convert to fraction form
    103,959.10/155,610.60 = 100,678.60/x
  3. Step 3: Cross multiply
    103,959.10x = 155,610.60 × 100,678.60
  4. Step 4: Simplify right side
    103,959.10x = 15,666,657,353.16
  5. Step 5: Solve for x
    x = 15,666,657,353.16/103,959.10
  6. Step 6: Final answer
    x = 150,700.20

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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.