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Finding the Fourth Proportional to 103,912.30, 155,868.45 and 74,266.30

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Solution

The fourth proportional to 103,912.30, 155,868.45 and 74,266.30 is: 111,399.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,912.30 : 155,868.45 = 74,266.30 : x
  2. Step 2: Convert to fraction form
    103,912.30/155,868.45 = 74,266.30/x
  3. Step 3: Cross multiply
    103,912.30x = 155,868.45 × 74,266.30
  4. Step 4: Simplify right side
    103,912.30x = 11,575,773,068.24
  5. Step 5: Solve for x
    x = 11,575,773,068.24/103,912.30
  6. Step 6: Final answer
    x = 111,399.45

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1.5x scale

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.