Home / 56,905.80-78,530-31,412.16

Finding the Fourth Proportional to 56,905.80, 78,530 and 31,412.16

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Solution

The fourth proportional to 56,905.80, 78,530 and 31,412.16 is: 43,348.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,905.80 : 78,530 = 31,412.16 : x
  2. Step 2: Convert to fraction form
    56,905.80/78,530 = 31,412.16/x
  3. Step 3: Cross multiply
    56,905.80x = 78,530 × 31,412.16
  4. Step 4: Simplify right side
    56,905.80x = 2,466,796,924.80
  5. Step 5: Solve for x
    x = 2,466,796,924.80/56,905.80
  6. Step 6: Final answer
    x = 43,348.78

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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.