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Finding the Fourth Proportional to 119,895.80, 179,627.70 and 57,428.60

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Solution

The fourth proportional to 119,895.80, 179,627.70 and 57,428.60 is: 86,039.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,895.80 : 179,627.70 = 57,428.60 : x
  2. Step 2: Convert to fraction form
    119,895.80/179,627.70 = 57,428.60/x
  3. Step 3: Cross multiply
    119,895.80x = 179,627.70 × 57,428.60
  4. Step 4: Simplify right side
    119,895.80x = 10,315,767,332.22
  5. Step 5: Solve for x
    x = 10,315,767,332.22/119,895.80
  6. Step 6: Final answer
    x = 86,039.44

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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.