Home / 56,430.21-77,874.56-30,939.01

Finding the Fourth Proportional to 56,430.21, 77,874.56 and 30,939.01

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Solution

The fourth proportional to 56,430.21, 77,874.56 and 30,939.01 is: 42,696.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,430.21 : 77,874.56 = 30,939.01 : x
  2. Step 2: Convert to fraction form
    56,430.21/77,874.56 = 30,939.01/x
  3. Step 3: Cross multiply
    56,430.21x = 77,874.56 × 30,939.01
  4. Step 4: Simplify right side
    56,430.21x = 2,409,361,635.89
  5. Step 5: Solve for x
    x = 2,409,361,635.89/56,430.21
  6. Step 6: Final answer
    x = 42,696.31

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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.