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Finding the Fourth Proportional to 93,720, 129,348.96 and 53,999.04

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Solution

The fourth proportional to 93,720, 129,348.96 and 53,999.04 is: 74,527.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,720 : 129,348.96 = 53,999.04 : x
  2. Step 2: Convert to fraction form
    93,720/129,348.96 = 53,999.04/x
  3. Step 3: Cross multiply
    93,720x = 129,348.96 × 53,999.04
  4. Step 4: Simplify right side
    93,720x = 6,984,719,665.00
  5. Step 5: Solve for x
    x = 6,984,719,665.00/93,720
  6. Step 6: Final answer
    x = 74,527.53

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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.