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Finding the Fourth Proportional to 155,698.10, 214,864.02 and 87,715.88

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Solution

The fourth proportional to 155,698.10, 214,864.02 and 87,715.88 is: 121,048.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,698.10 : 214,864.02 = 87,715.88 : x
  2. Step 2: Convert to fraction form
    155,698.10/214,864.02 = 87,715.88/x
  3. Step 3: Cross multiply
    155,698.10x = 214,864.02 × 87,715.88
  4. Step 4: Simplify right side
    155,698.10x = 18,846,986,594.64
  5. Step 5: Solve for x
    x = 18,846,986,594.64/155,698.10
  6. Step 6: Final answer
    x = 121,048.28

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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.