Home / 138,819.36-191,570.84-75,157.20

Finding the Fourth Proportional to 138,819.36, 191,570.84 and 75,157.20

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Solution

The fourth proportional to 138,819.36, 191,570.84 and 75,157.20 is: 103,717.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,819.36 : 191,570.84 = 75,157.20 : x
  2. Step 2: Convert to fraction form
    138,819.36/191,570.84 = 75,157.20/x
  3. Step 3: Cross multiply
    138,819.36x = 191,570.84 × 75,157.20
  4. Step 4: Simplify right side
    138,819.36x = 14,397,927,936.05
  5. Step 5: Solve for x
    x = 14,397,927,936.05/138,819.36
  6. Step 6: Final answer
    x = 103,717.00

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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.