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Finding the Fourth Proportional to 61,041.21, 91,549.49 and 42,489.99

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Solution

The fourth proportional to 61,041.21, 91,549.49 and 42,489.99 is: 63,726.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,041.21 : 91,549.49 = 42,489.99 : x
  2. Step 2: Convert to fraction form
    61,041.21/91,549.49 = 42,489.99/x
  3. Step 3: Cross multiply
    61,041.21x = 91,549.49 × 42,489.99
  4. Step 4: Simplify right side
    61,041.21x = 3,889,936,702.16
  5. Step 5: Solve for x
    x = 3,889,936,702.16/61,041.21
  6. Step 6: Final answer
    x = 63,726.40

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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.