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Finding the Fourth Proportional to 78,940.92, 108,938.34 and 43,130.92

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Solution

The fourth proportional to 78,940.92, 108,938.34 and 43,130.92 is: 59,520.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,940.92 : 108,938.34 = 43,130.92 : x
  2. Step 2: Convert to fraction form
    78,940.92/108,938.34 = 43,130.92/x
  3. Step 3: Cross multiply
    78,940.92x = 108,938.34 × 43,130.92
  4. Step 4: Simplify right side
    78,940.92x = 4,698,610,827.47
  5. Step 5: Solve for x
    x = 4,698,610,827.47/78,940.92
  6. Step 6: Final answer
    x = 59,520.60

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1.5x scale

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.