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Finding the Fourth Proportional to 72,609.04, 108,989.88 and 64,342

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Solution

The fourth proportional to 72,609.04, 108,989.88 and 64,342 is: 96,580.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,609.04 : 108,989.88 = 64,342 : x
  2. Step 2: Convert to fraction form
    72,609.04/108,989.88 = 64,342/x
  3. Step 3: Cross multiply
    72,609.04x = 108,989.88 × 64,342
  4. Step 4: Simplify right side
    72,609.04x = 7,012,626,858.96
  5. Step 5: Solve for x
    x = 7,012,626,858.96/72,609.04
  6. Step 6: Final answer
    x = 96,580.63

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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.