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Finding the Fourth Proportional to 158,411.52, 218,613.36 and 86,797.68

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Solution

The fourth proportional to 158,411.52, 218,613.36 and 86,797.68 is: 119,783.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,411.52 : 218,613.36 = 86,797.68 : x
  2. Step 2: Convert to fraction form
    158,411.52/218,613.36 = 86,797.68/x
  3. Step 3: Cross multiply
    158,411.52x = 218,613.36 × 86,797.68
  4. Step 4: Simplify right side
    158,411.52x = 18,975,132,465.00
  5. Step 5: Solve for x
    x = 18,975,132,465.00/158,411.52
  6. Step 6: Final answer
    x = 119,783.79

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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.