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Finding the Fourth Proportional to 72,615.54, 108,999.63 and 64,348.50

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Solution

The fourth proportional to 72,615.54, 108,999.63 and 64,348.50 is: 96,590.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,615.54 : 108,999.63 = 64,348.50 : x
  2. Step 2: Convert to fraction form
    72,615.54/108,999.63 = 64,348.50/x
  3. Step 3: Cross multiply
    72,615.54x = 108,999.63 × 64,348.50
  4. Step 4: Simplify right side
    72,615.54x = 7,013,962,691.06
  5. Step 5: Solve for x
    x = 7,013,962,691.06/72,615.54
  6. Step 6: Final answer
    x = 96,590.38

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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.