Home / 138,146.11-190,626.14-77,715.50

Finding the Fourth Proportional to 138,146.11, 190,626.14 and 77,715.50

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Solution

The fourth proportional to 138,146.11, 190,626.14 and 77,715.50 is: 107,238.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,146.11 : 190,626.14 = 77,715.50 : x
  2. Step 2: Convert to fraction form
    138,146.11/190,626.14 = 77,715.50/x
  3. Step 3: Cross multiply
    138,146.11x = 190,626.14 × 77,715.50
  4. Step 4: Simplify right side
    138,146.11x = 14,814,605,024.33
  5. Step 5: Solve for x
    x = 14,814,605,024.33/138,146.11
  6. Step 6: Final answer
    x = 107,238.67

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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.