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Finding the Fourth Proportional to 423,735.12, 635,603.74 and 103,888.43

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Solution

The fourth proportional to 423,735.12, 635,603.74 and 103,888.43 is: 155,832.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,735.12 : 635,603.74 = 103,888.43 : x
  2. Step 2: Convert to fraction form
    423,735.12/635,603.74 = 103,888.43/x
  3. Step 3: Cross multiply
    423,735.12x = 635,603.74 × 103,888.43
  4. Step 4: Simplify right side
    423,735.12x = 66,031,871,212.99
  5. Step 5: Solve for x
    x = 66,031,871,212.99/423,735.12
  6. Step 6: Final answer
    x = 155,832.90

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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.