Home / 56,808.78-78,399.54-31,315.11

Finding the Fourth Proportional to 56,808.78, 78,399.54 and 31,315.11

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Solution

The fourth proportional to 56,808.78, 78,399.54 and 31,315.11 is: 43,216.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,808.78 : 78,399.54 = 31,315.11 : x
  2. Step 2: Convert to fraction form
    56,808.78/78,399.54 = 31,315.11/x
  3. Step 3: Cross multiply
    56,808.78x = 78,399.54 × 31,315.11
  4. Step 4: Simplify right side
    56,808.78x = 2,455,090,219.05
  5. Step 5: Solve for x
    x = 2,455,090,219.05/56,808.78
  6. Step 6: Final answer
    x = 43,216.74

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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.