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Finding the Fourth Proportional to 458,632.98, 687,979.80 and 121,668.90

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Solution

The fourth proportional to 458,632.98, 687,979.80 and 121,668.90 is: 182,511.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,632.98 : 687,979.80 = 121,668.90 : x
  2. Step 2: Convert to fraction form
    458,632.98/687,979.80 = 121,668.90/x
  3. Step 3: Cross multiply
    458,632.98x = 687,979.80 × 121,668.90
  4. Step 4: Simplify right side
    458,632.98x = 83,705,745,488.22
  5. Step 5: Solve for x
    x = 83,705,745,488.22/458,632.98
  6. Step 6: Final answer
    x = 182,511.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.