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Finding the Fourth Proportional to 158,021.70, 218,068.46 and 86,400.96

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Solution

The fourth proportional to 158,021.70, 218,068.46 and 86,400.96 is: 119,232.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,021.70 : 218,068.46 = 86,400.96 : x
  2. Step 2: Convert to fraction form
    158,021.70/218,068.46 = 86,400.96/x
  3. Step 3: Cross multiply
    158,021.70x = 218,068.46 × 86,400.96
  4. Step 4: Simplify right side
    158,021.70x = 18,841,324,289.72
  5. Step 5: Solve for x
    x = 18,841,324,289.72/158,021.70
  6. Step 6: Final answer
    x = 119,232.51

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1.5x scale

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.