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Finding the Fourth Proportional to 154,605.60, 231,639.60 and 71,328.80

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Solution

The fourth proportional to 154,605.60, 231,639.60 and 71,328.80 is: 106,869.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,605.60 : 231,639.60 = 71,328.80 : x
  2. Step 2: Convert to fraction form
    154,605.60/231,639.60 = 71,328.80/x
  3. Step 3: Cross multiply
    154,605.60x = 231,639.60 × 71,328.80
  4. Step 4: Simplify right side
    154,605.60x = 16,522,574,700.48
  5. Step 5: Solve for x
    x = 16,522,574,700.48/154,605.60
  6. Step 6: Final answer
    x = 106,869.19

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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.