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Finding the Fourth Proportional to 79,638.90, 109,901.76 and 43,828.92

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Solution

The fourth proportional to 79,638.90, 109,901.76 and 43,828.92 is: 60,483.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,638.90 : 109,901.76 = 43,828.92 : x
  2. Step 2: Convert to fraction form
    79,638.90/109,901.76 = 43,828.92/x
  3. Step 3: Cross multiply
    79,638.90x = 109,901.76 × 43,828.92
  4. Step 4: Simplify right side
    79,638.90x = 4,816,875,446.90
  5. Step 5: Solve for x
    x = 4,816,875,446.90/79,638.90
  6. Step 6: Final answer
    x = 60,483.95

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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.