Home / 145,660.96-201,012.45-81,129.67

Finding the Fourth Proportional to 145,660.96, 201,012.45 and 81,129.67

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Solution

The fourth proportional to 145,660.96, 201,012.45 and 81,129.67 is: 111,959.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,660.96 : 201,012.45 = 81,129.67 : x
  2. Step 2: Convert to fraction form
    145,660.96/201,012.45 = 81,129.67/x
  3. Step 3: Cross multiply
    145,660.96x = 201,012.45 × 81,129.67
  4. Step 4: Simplify right side
    145,660.96x = 16,308,073,734.39
  5. Step 5: Solve for x
    x = 16,308,073,734.39/145,660.96
  6. Step 6: Final answer
    x = 111,959.13

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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.