Home / 57,018-78,686.52-31,867.56

Finding the Fourth Proportional to 57,018, 78,686.52 and 31,867.56

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Solution

The fourth proportional to 57,018, 78,686.52 and 31,867.56 is: 43,978.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,018 : 78,686.52 = 31,867.56 : x
  2. Step 2: Convert to fraction form
    57,018/78,686.52 = 31,867.56/x
  3. Step 3: Cross multiply
    57,018x = 78,686.52 × 31,867.56
  4. Step 4: Simplify right side
    57,018x = 2,507,547,397.29
  5. Step 5: Solve for x
    x = 2,507,547,397.29/57,018
  6. Step 6: Final answer
    x = 43,978.17

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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.