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Finding the Fourth Proportional to 61,188.50, 84,487.92 and 39,688.46

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Solution

The fourth proportional to 61,188.50, 84,487.92 and 39,688.46 is: 54,801.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,188.50 : 84,487.92 = 39,688.46 : x
  2. Step 2: Convert to fraction form
    61,188.50/84,487.92 = 39,688.46/x
  3. Step 3: Cross multiply
    61,188.50x = 84,487.92 × 39,688.46
  4. Step 4: Simplify right side
    61,188.50x = 3,353,195,433.40
  5. Step 5: Solve for x
    x = 3,353,195,433.40/61,188.50
  6. Step 6: Final answer
    x = 54,801.07

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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.