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Finding the Fourth Proportional to 158,810.68, 219,148.92 and 87,190.30

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Solution

The fourth proportional to 158,810.68, 219,148.92 and 87,190.30 is: 120,317.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,810.68 : 219,148.92 = 87,190.30 : x
  2. Step 2: Convert to fraction form
    158,810.68/219,148.92 = 87,190.30/x
  3. Step 3: Cross multiply
    158,810.68x = 219,148.92 × 87,190.30
  4. Step 4: Simplify right side
    158,810.68x = 19,107,660,079.48
  5. Step 5: Solve for x
    x = 19,107,660,079.48/158,810.68
  6. Step 6: Final answer
    x = 120,317.22

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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.