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Finding the Fourth Proportional to 61,339.88, 91,982.49 and 42,739.45

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Solution

The fourth proportional to 61,339.88, 91,982.49 and 42,739.45 is: 64,090.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,339.88 : 91,982.49 = 42,739.45 : x
  2. Step 2: Convert to fraction form
    61,339.88/91,982.49 = 42,739.45/x
  3. Step 3: Cross multiply
    61,339.88x = 91,982.49 × 42,739.45
  4. Step 4: Simplify right side
    61,339.88x = 3,931,280,642.00
  5. Step 5: Solve for x
    x = 3,931,280,642.00/61,339.88
  6. Step 6: Final answer
    x = 64,090.12

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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.