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Finding the Fourth Proportional to 155,376.69, 214,417.71 and 87,393.65

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Solution

The fourth proportional to 155,376.69, 214,417.71 and 87,393.65 is: 120,602.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,376.69 : 214,417.71 = 87,393.65 : x
  2. Step 2: Convert to fraction form
    155,376.69/214,417.71 = 87,393.65/x
  3. Step 3: Cross multiply
    155,376.69x = 214,417.71 × 87,393.65
  4. Step 4: Simplify right side
    155,376.69x = 18,738,745,229.45
  5. Step 5: Solve for x
    x = 18,738,745,229.45/155,376.69
  6. Step 6: Final answer
    x = 120,602.04

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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.