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Finding the Fourth Proportional to 78,633.28, 117,929.12 and 53,668.80

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Solution

The fourth proportional to 78,633.28, 117,929.12 and 53,668.80 is: 80,489.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,633.28 : 117,929.12 = 53,668.80 : x
  2. Step 2: Convert to fraction form
    78,633.28/117,929.12 = 53,668.80/x
  3. Step 3: Cross multiply
    78,633.28x = 117,929.12 × 53,668.80
  4. Step 4: Simplify right side
    78,633.28x = 6,329,114,355.46
  5. Step 5: Solve for x
    x = 6,329,114,355.46/78,633.28
  6. Step 6: Final answer
    x = 80,489.00

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1.5x scale

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.