Home / 139,881.48-193,038.60-76,219.20

Finding the Fourth Proportional to 139,881.48, 193,038.60 and 76,219.20

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Solution

The fourth proportional to 139,881.48, 193,038.60 and 76,219.20 is: 105,183.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,881.48 : 193,038.60 = 76,219.20 : x
  2. Step 2: Convert to fraction form
    139,881.48/193,038.60 = 76,219.20/x
  3. Step 3: Cross multiply
    139,881.48x = 193,038.60 × 76,219.20
  4. Step 4: Simplify right side
    139,881.48x = 14,713,247,661.12
  5. Step 5: Solve for x
    x = 14,713,247,661.12/139,881.48
  6. Step 6: Final answer
    x = 105,183.67

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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.