Home / 56,815.36-78,412.80-31,667.20

Finding the Fourth Proportional to 56,815.36, 78,412.80 and 31,667.20

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Solution

The fourth proportional to 56,815.36, 78,412.80 and 31,667.20 is: 43,704.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,815.36 : 78,412.80 = 31,667.20 : x
  2. Step 2: Convert to fraction form
    56,815.36/78,412.80 = 31,667.20/x
  3. Step 3: Cross multiply
    56,815.36x = 78,412.80 × 31,667.20
  4. Step 4: Simplify right side
    56,815.36x = 2,483,113,820.16
  5. Step 5: Solve for x
    x = 2,483,113,820.16/56,815.36
  6. Step 6: Final answer
    x = 43,704.97

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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.