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Finding the Fourth Proportional to 61,189.50, 84,489.30 and 39,689.46

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Solution

The fourth proportional to 61,189.50, 84,489.30 and 39,689.46 is: 54,802.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,189.50 : 84,489.30 = 39,689.46 : x
  2. Step 2: Convert to fraction form
    61,189.50/84,489.30 = 39,689.46/x
  3. Step 3: Cross multiply
    61,189.50x = 84,489.30 × 39,689.46
  4. Step 4: Simplify right side
    61,189.50x = 3,353,334,692.78
  5. Step 5: Solve for x
    x = 3,353,334,692.78/61,189.50
  6. Step 6: Final answer
    x = 54,802.45

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1.5x scale

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.