Home / 105,131.88-145,084.74-57,389.64

Finding the Fourth Proportional to 105,131.88, 145,084.74 and 57,389.64

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Solution

The fourth proportional to 105,131.88, 145,084.74 and 57,389.64 is: 79,199.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,131.88 : 145,084.74 = 57,389.64 : x
  2. Step 2: Convert to fraction form
    105,131.88/145,084.74 = 57,389.64/x
  3. Step 3: Cross multiply
    105,131.88x = 145,084.74 × 57,389.64
  4. Step 4: Simplify right side
    105,131.88x = 8,326,360,998.09
  5. Step 5: Solve for x
    x = 8,326,360,998.09/105,131.88
  6. Step 6: Final answer
    x = 79,199.20

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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.