Home / 157,278.51-235,808.42-81,192.78

Finding the Fourth Proportional to 157,278.51, 235,808.42 and 81,192.78

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Solution

The fourth proportional to 157,278.51, 235,808.42 and 81,192.78 is: 121,732.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,278.51 : 235,808.42 = 81,192.78 : x
  2. Step 2: Convert to fraction form
    157,278.51/235,808.42 = 81,192.78/x
  3. Step 3: Cross multiply
    157,278.51x = 235,808.42 × 81,192.78
  4. Step 4: Simplify right side
    157,278.51x = 19,145,940,761.24
  5. Step 5: Solve for x
    x = 19,145,940,761.24/157,278.51
  6. Step 6: Final answer
    x = 121,732.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.