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Finding the Fourth Proportional to 158,354.07, 218,532.87 and 89,438.01

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Solution

The fourth proportional to 158,354.07, 218,532.87 and 89,438.01 is: 123,426.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,354.07 : 218,532.87 = 89,438.01 : x
  2. Step 2: Convert to fraction form
    158,354.07/218,532.87 = 89,438.01/x
  3. Step 3: Cross multiply
    158,354.07x = 218,532.87 × 89,438.01
  4. Step 4: Simplify right side
    158,354.07x = 19,545,145,012.39
  5. Step 5: Solve for x
    x = 19,545,145,012.39/158,354.07
  6. Step 6: Final answer
    x = 123,426.86

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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.