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Finding the Fourth Proportional to 157,885.48, 217,879.20 and 86,263.72

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Solution

The fourth proportional to 157,885.48, 217,879.20 and 86,263.72 is: 119,042.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,885.48 : 217,879.20 = 86,263.72 : x
  2. Step 2: Convert to fraction form
    157,885.48/217,879.20 = 86,263.72/x
  3. Step 3: Cross multiply
    157,885.48x = 217,879.20 × 86,263.72
  4. Step 4: Simplify right side
    157,885.48x = 18,795,070,302.62
  5. Step 5: Solve for x
    x = 18,795,070,302.62/157,885.48
  6. Step 6: Final answer
    x = 119,042.42

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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.