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Finding the Fourth Proportional to 158,711.16, 219,020.80 and 87,092.38

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Solution

The fourth proportional to 158,711.16, 219,020.80 and 87,092.38 is: 120,187.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,711.16 : 219,020.80 = 87,092.38 : x
  2. Step 2: Convert to fraction form
    158,711.16/219,020.80 = 87,092.38/x
  3. Step 3: Cross multiply
    158,711.16x = 219,020.80 × 87,092.38
  4. Step 4: Simplify right side
    158,711.16x = 19,075,042,741.50
  5. Step 5: Solve for x
    x = 19,075,042,741.50/158,711.16
  6. Step 6: Final answer
    x = 120,187.15

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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.