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Finding the Fourth Proportional to 458,672.60, 688,008.90 and 121,712.60

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Solution

The fourth proportional to 458,672.60, 688,008.90 and 121,712.60 is: 182,568.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,672.60 : 688,008.90 = 121,712.60 : x
  2. Step 2: Convert to fraction form
    458,672.60/688,008.90 = 121,712.60/x
  3. Step 3: Cross multiply
    458,672.60x = 688,008.90 × 121,712.60
  4. Step 4: Simplify right side
    458,672.60x = 83,739,352,042.14
  5. Step 5: Solve for x
    x = 83,739,352,042.14/458,672.60
  6. Step 6: Final answer
    x = 182,568.90

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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.