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Finding the Fourth Proportional to 153,472.92, 211,743.90 and 86,391.96

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Solution

The fourth proportional to 153,472.92, 211,743.90 and 86,391.96 is: 119,193.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,472.92 : 211,743.90 = 86,391.96 : x
  2. Step 2: Convert to fraction form
    153,472.92/211,743.90 = 86,391.96/x
  3. Step 3: Cross multiply
    153,472.92x = 211,743.90 × 86,391.96
  4. Step 4: Simplify right side
    153,472.92x = 18,292,970,539.04
  5. Step 5: Solve for x
    x = 18,292,970,539.04/153,472.92
  6. Step 6: Final answer
    x = 119,193.47

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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.