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Finding the Fourth Proportional to 123,396.40, 185,094.60 and 70,908.40

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Solution

The fourth proportional to 123,396.40, 185,094.60 and 70,908.40 is: 106,362.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,396.40 : 185,094.60 = 70,908.40 : x
  2. Step 2: Convert to fraction form
    123,396.40/185,094.60 = 70,908.40/x
  3. Step 3: Cross multiply
    123,396.40x = 185,094.60 × 70,908.40
  4. Step 4: Simplify right side
    123,396.40x = 13,124,761,934.64
  5. Step 5: Solve for x
    x = 13,124,761,934.64/123,396.40
  6. Step 6: Final answer
    x = 106,362.60

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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.