Home / 105,261.89-145,261.05-57,515.63

Finding the Fourth Proportional to 105,261.89, 145,261.05 and 57,515.63

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Solution

The fourth proportional to 105,261.89, 145,261.05 and 57,515.63 is: 79,371.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,261.89 : 145,261.05 = 57,515.63 : x
  2. Step 2: Convert to fraction form
    105,261.89/145,261.05 = 57,515.63/x
  3. Step 3: Cross multiply
    105,261.89x = 145,261.05 × 57,515.63
  4. Step 4: Simplify right side
    105,261.89x = 8,354,780,078.91
  5. Step 5: Solve for x
    x = 8,354,780,078.91/105,261.89
  6. Step 6: Final answer
    x = 79,371.37

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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.