Home / 56,509.89-77,987.28-31,359.39

Finding the Fourth Proportional to 56,509.89, 77,987.28 and 31,359.39

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Solution

The fourth proportional to 56,509.89, 77,987.28 and 31,359.39 is: 43,277.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,509.89 : 77,987.28 = 31,359.39 : x
  2. Step 2: Convert to fraction form
    56,509.89/77,987.28 = 31,359.39/x
  3. Step 3: Cross multiply
    56,509.89x = 77,987.28 × 31,359.39
  4. Step 4: Simplify right side
    56,509.89x = 2,445,633,528.56
  5. Step 5: Solve for x
    x = 2,445,633,528.56/56,509.89
  6. Step 6: Final answer
    x = 43,277.97

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1.5x scale

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.