Home / 56,858.28-78,464.78-31,709.40

Finding the Fourth Proportional to 56,858.28, 78,464.78 and 31,709.40

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Solution

The fourth proportional to 56,858.28, 78,464.78 and 31,709.40 is: 43,759.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,858.28 : 78,464.78 = 31,709.40 : x
  2. Step 2: Convert to fraction form
    56,858.28/78,464.78 = 31,709.40/x
  3. Step 3: Cross multiply
    56,858.28x = 78,464.78 × 31,709.40
  4. Step 4: Simplify right side
    56,858.28x = 2,488,071,094.93
  5. Step 5: Solve for x
    x = 2,488,071,094.93/56,858.28
  6. Step 6: Final answer
    x = 43,759.17

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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.