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Finding the Fourth Proportional to 171,436.60, 257,300.70 and 76,812.40

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Solution

The fourth proportional to 171,436.60, 257,300.70 and 76,812.40 is: 115,283.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,436.60 : 257,300.70 = 76,812.40 : x
  2. Step 2: Convert to fraction form
    171,436.60/257,300.70 = 76,812.40/x
  3. Step 3: Cross multiply
    171,436.60x = 257,300.70 × 76,812.40
  4. Step 4: Simplify right side
    171,436.60x = 19,763,884,288.68
  5. Step 5: Solve for x
    x = 19,763,884,288.68/171,436.60
  6. Step 6: Final answer
    x = 115,283.93

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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.