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Finding the Fourth Proportional to 42,408.40, 63,641.40 and 23,688.40

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Solution

The fourth proportional to 42,408.40, 63,641.40 and 23,688.40 is: 35,548.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,408.40 : 63,641.40 = 23,688.40 : x
  2. Step 2: Convert to fraction form
    42,408.40/63,641.40 = 23,688.40/x
  3. Step 3: Cross multiply
    42,408.40x = 63,641.40 × 23,688.40
  4. Step 4: Simplify right side
    42,408.40x = 1,507,562,939.76
  5. Step 5: Solve for x
    x = 1,507,562,939.76/42,408.40
  6. Step 6: Final answer
    x = 35,548.69

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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.