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Finding the Fourth Proportional to 157,658.88, 217,649.52 and 121,768.32

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Solution

The fourth proportional to 157,658.88, 217,649.52 and 121,768.32 is: 168,102.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,658.88 : 217,649.52 = 121,768.32 : x
  2. Step 2: Convert to fraction form
    157,658.88/217,649.52 = 121,768.32/x
  3. Step 3: Cross multiply
    157,658.88x = 217,649.52 × 121,768.32
  4. Step 4: Simplify right side
    157,658.88x = 26,502,816,399.21
  5. Step 5: Solve for x
    x = 26,502,816,399.21/157,658.88
  6. Step 6: Final answer
    x = 168,102.27

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1.5x scale

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.