Home / 57,019.56-78,678.18-31,864.20

Finding the Fourth Proportional to 57,019.56, 78,678.18 and 31,864.20

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Solution

The fourth proportional to 57,019.56, 78,678.18 and 31,864.20 is: 43,967.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,019.56 : 78,678.18 = 31,864.20 : x
  2. Step 2: Convert to fraction form
    57,019.56/78,678.18 = 31,864.20/x
  3. Step 3: Cross multiply
    57,019.56x = 78,678.18 × 31,864.20
  4. Step 4: Simplify right side
    57,019.56x = 2,507,017,263.16
  5. Step 5: Solve for x
    x = 2,507,017,263.16/57,019.56
  6. Step 6: Final answer
    x = 43,967.67

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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.