Home / 135,289.95-186,640.47-81,543.21

Finding the Fourth Proportional to 135,289.95, 186,640.47 and 81,543.21

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Solution

The fourth proportional to 135,289.95, 186,640.47 and 81,543.21 is: 112,493.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,289.95 : 186,640.47 = 81,543.21 : x
  2. Step 2: Convert to fraction form
    135,289.95/186,640.47 = 81,543.21/x
  3. Step 3: Cross multiply
    135,289.95x = 186,640.47 × 81,543.21
  4. Step 4: Simplify right side
    135,289.95x = 15,219,263,039.71
  5. Step 5: Solve for x
    x = 15,219,263,039.71/135,289.95
  6. Step 6: Final answer
    x = 112,493.67

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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.