Home / 51,139.56-76,719.78-21,557.40

Finding the Fourth Proportional to 51,139.56, 76,719.78 and 21,557.40

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Solution

The fourth proportional to 51,139.56, 76,719.78 and 21,557.40 is: 32,340.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,139.56 : 76,719.78 = 21,557.40 : x
  2. Step 2: Convert to fraction form
    51,139.56/76,719.78 = 21,557.40/x
  3. Step 3: Cross multiply
    51,139.56x = 76,719.78 × 21,557.40
  4. Step 4: Simplify right side
    51,139.56x = 1,653,878,985.37
  5. Step 5: Solve for x
    x = 1,653,878,985.37/51,139.56
  6. Step 6: Final answer
    x = 32,340.50

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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.