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Finding the Fourth Proportional to 209,784.48, 289,480.48 and 124,889.92

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Solution

The fourth proportional to 209,784.48, 289,480.48 and 124,889.92 is: 172,334.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,784.48 : 289,480.48 = 124,889.92 : x
  2. Step 2: Convert to fraction form
    209,784.48/289,480.48 = 124,889.92/x
  3. Step 3: Cross multiply
    209,784.48x = 289,480.48 × 124,889.92
  4. Step 4: Simplify right side
    209,784.48x = 36,153,193,988.76
  5. Step 5: Solve for x
    x = 36,153,193,988.76/209,784.48
  6. Step 6: Final answer
    x = 172,334.93

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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.