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Finding the Fourth Proportional to 78,898.72, 108,875.45 and 43,081.46

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Solution

The fourth proportional to 78,898.72, 108,875.45 and 43,081.46 is: 59,449.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,898.72 : 108,875.45 = 43,081.46 : x
  2. Step 2: Convert to fraction form
    78,898.72/108,875.45 = 43,081.46/x
  3. Step 3: Cross multiply
    78,898.72x = 108,875.45 × 43,081.46
  4. Step 4: Simplify right side
    78,898.72x = 4,690,513,128.75
  5. Step 5: Solve for x
    x = 4,690,513,128.75/78,898.72
  6. Step 6: Final answer
    x = 59,449.80

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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.