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Finding the Fourth Proportional to 342,649.20, 513,973.80 and 89,929.20

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Solution

The fourth proportional to 342,649.20, 513,973.80 and 89,929.20 is: 134,893.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,649.20 : 513,973.80 = 89,929.20 : x
  2. Step 2: Convert to fraction form
    342,649.20/513,973.80 = 89,929.20/x
  3. Step 3: Cross multiply
    342,649.20x = 513,973.80 × 89,929.20
  4. Step 4: Simplify right side
    342,649.20x = 46,221,252,654.96
  5. Step 5: Solve for x
    x = 46,221,252,654.96/342,649.20
  6. Step 6: Final answer
    x = 134,893.80

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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.