Home / 56,688.40-78,231.42-31,195.42

Finding the Fourth Proportional to 56,688.40, 78,231.42 and 31,195.42

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Solution

The fourth proportional to 56,688.40, 78,231.42 and 31,195.42 is: 43,050.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,688.40 : 78,231.42 = 31,195.42 : x
  2. Step 2: Convert to fraction form
    56,688.40/78,231.42 = 31,195.42/x
  3. Step 3: Cross multiply
    56,688.40x = 78,231.42 × 31,195.42
  4. Step 4: Simplify right side
    56,688.40x = 2,440,462,004.10
  5. Step 5: Solve for x
    x = 2,440,462,004.10/56,688.40
  6. Step 6: Final answer
    x = 43,050.47

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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.