Home / 138,899.56-191,712.84-78,505.24

Finding the Fourth Proportional to 138,899.56, 191,712.84 and 78,505.24

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Solution

The fourth proportional to 138,899.56, 191,712.84 and 78,505.24 is: 108,355.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,899.56 : 191,712.84 = 78,505.24 : x
  2. Step 2: Convert to fraction form
    138,899.56/191,712.84 = 78,505.24/x
  3. Step 3: Cross multiply
    138,899.56x = 191,712.84 × 78,505.24
  4. Step 4: Simplify right side
    138,899.56x = 15,050,462,515.28
  5. Step 5: Solve for x
    x = 15,050,462,515.28/138,899.56
  6. Step 6: Final answer
    x = 108,355.00

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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.