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Finding the Fourth Proportional to 72,415.62, 99,958.05 and 45,603

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Solution

The fourth proportional to 72,415.62, 99,958.05 and 45,603 is: 62,947.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,415.62 : 99,958.05 = 45,603 : x
  2. Step 2: Convert to fraction form
    72,415.62/99,958.05 = 45,603/x
  3. Step 3: Cross multiply
    72,415.62x = 99,958.05 × 45,603
  4. Step 4: Simplify right side
    72,415.62x = 4,558,386,954.15
  5. Step 5: Solve for x
    x = 4,558,386,954.15/72,415.62
  6. Step 6: Final answer
    x = 62,947.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.