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Finding the Fourth Proportional to 81,580.50, 112,581.36 and 47,612.34

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Solution

The fourth proportional to 81,580.50, 112,581.36 and 47,612.34 is: 65,705.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,580.50 : 112,581.36 = 47,612.34 : x
  2. Step 2: Convert to fraction form
    81,580.50/112,581.36 = 47,612.34/x
  3. Step 3: Cross multiply
    81,580.50x = 112,581.36 × 47,612.34
  4. Step 4: Simplify right side
    81,580.50x = 5,360,261,989.98
  5. Step 5: Solve for x
    x = 5,360,261,989.98/81,580.50
  6. Step 6: Final answer
    x = 65,705.19

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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.