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Finding the Fourth Proportional to 119,860.60, 179,985.30 and 86,812.60

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Solution

The fourth proportional to 119,860.60, 179,985.30 and 86,812.60 is: 130,359.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,860.60 : 179,985.30 = 86,812.60 : x
  2. Step 2: Convert to fraction form
    119,860.60/179,985.30 = 86,812.60/x
  3. Step 3: Cross multiply
    119,860.60x = 179,985.30 × 86,812.60
  4. Step 4: Simplify right side
    119,860.60x = 15,624,991,854.78
  5. Step 5: Solve for x
    x = 15,624,991,854.78/119,860.60
  6. Step 6: Final answer
    x = 130,359.70

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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.