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Finding the Fourth Proportional to 155,266.65, 214,254.81 and 87,278.49

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Solution

The fourth proportional to 155,266.65, 214,254.81 and 87,278.49 is: 120,436.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,266.65 : 214,254.81 = 87,278.49 : x
  2. Step 2: Convert to fraction form
    155,266.65/214,254.81 = 87,278.49/x
  3. Step 3: Cross multiply
    155,266.65x = 214,254.81 × 87,278.49
  4. Step 4: Simplify right side
    155,266.65x = 18,699,836,292.04
  5. Step 5: Solve for x
    x = 18,699,836,292.04/155,266.65
  6. Step 6: Final answer
    x = 120,436.91

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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.