Home / 138,117.96-190,604.76-81,529.34

Finding the Fourth Proportional to 138,117.96, 190,604.76 and 81,529.34

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Solution

The fourth proportional to 138,117.96, 190,604.76 and 81,529.34 is: 112,511.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,117.96 : 190,604.76 = 81,529.34 : x
  2. Step 2: Convert to fraction form
    138,117.96/190,604.76 = 81,529.34/x
  3. Step 3: Cross multiply
    138,117.96x = 190,604.76 × 81,529.34
  4. Step 4: Simplify right side
    138,117.96x = 15,539,880,283.66
  5. Step 5: Solve for x
    x = 15,539,880,283.66/138,117.96
  6. Step 6: Final answer
    x = 112,511.66

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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.