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Finding the Fourth Proportional to 42,237.99, 63,378.99 and 30,646.89

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Solution

The fourth proportional to 42,237.99, 63,378.99 and 30,646.89 is: 45,986.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,237.99 : 63,378.99 = 30,646.89 : x
  2. Step 2: Convert to fraction form
    42,237.99/63,378.99 = 30,646.89/x
  3. Step 3: Cross multiply
    42,237.99x = 63,378.99 × 30,646.89
  4. Step 4: Simplify right side
    42,237.99x = 1,942,368,934.84
  5. Step 5: Solve for x
    x = 1,942,368,934.84/42,237.99
  6. Step 6: Final answer
    x = 45,986.30

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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.