Home / 56,812.31-78,401.23-31,318.12

Finding the Fourth Proportional to 56,812.31, 78,401.23 and 31,318.12

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Solution

The fourth proportional to 56,812.31, 78,401.23 and 31,318.12 is: 43,219.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,812.31 : 78,401.23 = 31,318.12 : x
  2. Step 2: Convert to fraction form
    56,812.31/78,401.23 = 31,318.12/x
  3. Step 3: Cross multiply
    56,812.31x = 78,401.23 × 31,318.12
  4. Step 4: Simplify right side
    56,812.31x = 2,455,379,129.29
  5. Step 5: Solve for x
    x = 2,455,379,129.29/56,812.31
  6. Step 6: Final answer
    x = 43,219.14

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1.5x scale

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.