Home / 56,129.50-77,458.80-30,979

Finding the Fourth Proportional to 56,129.50, 77,458.80 and 30,979

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Solution

The fourth proportional to 56,129.50, 77,458.80 and 30,979 is: 42,751.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,129.50 : 77,458.80 = 30,979 : x
  2. Step 2: Convert to fraction form
    56,129.50/77,458.80 = 30,979/x
  3. Step 3: Cross multiply
    56,129.50x = 77,458.80 × 30,979
  4. Step 4: Simplify right side
    56,129.50x = 2,399,596,165.20
  5. Step 5: Solve for x
    x = 2,399,596,165.20/56,129.50
  6. Step 6: Final answer
    x = 42,751.07

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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.