Home / 138,875.56-208,324.14-45,390.76

Finding the Fourth Proportional to 138,875.56, 208,324.14 and 45,390.76

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Solution

The fourth proportional to 138,875.56, 208,324.14 and 45,390.76 is: 68,089.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,875.56 : 208,324.14 = 45,390.76 : x
  2. Step 2: Convert to fraction form
    138,875.56/208,324.14 = 45,390.76/x
  3. Step 3: Cross multiply
    138,875.56x = 208,324.14 × 45,390.76
  4. Step 4: Simplify right side
    138,875.56x = 9,455,991,040.95
  5. Step 5: Solve for x
    x = 9,455,991,040.95/138,875.56
  6. Step 6: Final answer
    x = 68,089.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.