Home / 51,139.60-76,611.12-31,360.48

Finding the Fourth Proportional to 51,139.60, 76,611.12 and 31,360.48

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Solution

The fourth proportional to 51,139.60, 76,611.12 and 31,360.48 is: 46,980.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,139.60 : 76,611.12 = 31,360.48 : x
  2. Step 2: Convert to fraction form
    51,139.60/76,611.12 = 31,360.48/x
  3. Step 3: Cross multiply
    51,139.60x = 76,611.12 × 31,360.48
  4. Step 4: Simplify right side
    51,139.60x = 2,402,561,496.54
  5. Step 5: Solve for x
    x = 2,402,561,496.54/51,139.60
  6. Step 6: Final answer
    x = 46,980.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.