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Finding the Fourth Proportional to 42,768.56, 64,156.08 and 11,603

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Solution

The fourth proportional to 42,768.56, 64,156.08 and 11,603 is: 17,405.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,768.56 : 64,156.08 = 11,603 : x
  2. Step 2: Convert to fraction form
    42,768.56/64,156.08 = 11,603/x
  3. Step 3: Cross multiply
    42,768.56x = 64,156.08 × 11,603
  4. Step 4: Simplify right side
    42,768.56x = 744,402,996.24
  5. Step 5: Solve for x
    x = 744,402,996.24/42,768.56
  6. Step 6: Final answer
    x = 17,405.38

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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.