Home / 138,412.45-191,002.12-77,986.67

Finding the Fourth Proportional to 138,412.45, 191,002.12 and 77,986.67

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Solution

The fourth proportional to 138,412.45, 191,002.12 and 77,986.67 is: 107,617.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,412.45 : 191,002.12 = 77,986.67 : x
  2. Step 2: Convert to fraction form
    138,412.45/191,002.12 = 77,986.67/x
  3. Step 3: Cross multiply
    138,412.45x = 191,002.12 × 77,986.67
  4. Step 4: Simplify right side
    138,412.45x = 14,895,618,151.76
  5. Step 5: Solve for x
    x = 14,895,618,151.76/138,412.45
  6. Step 6: Final answer
    x = 107,617.62

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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.