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Finding the Fourth Proportional to 157,668.88, 217,663.32 and 121,778.32

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Solution

The fourth proportional to 157,668.88, 217,663.32 and 121,778.32 is: 168,116.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,668.88 : 217,663.32 = 121,778.32 : x
  2. Step 2: Convert to fraction form
    157,668.88/217,663.32 = 121,778.32/x
  3. Step 3: Cross multiply
    157,668.88x = 217,663.32 × 121,778.32
  4. Step 4: Simplify right side
    157,668.88x = 26,506,673,435.22
  5. Step 5: Solve for x
    x = 26,506,673,435.22/157,668.88
  6. Step 6: Final answer
    x = 168,116.08

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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.