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Finding the Fourth Proportional to 72,653.73, 108,914.58 and 64,780.53

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Solution

The fourth proportional to 72,653.73, 108,914.58 and 64,780.53 is: 97,111.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,653.73 : 108,914.58 = 64,780.53 : x
  2. Step 2: Convert to fraction form
    72,653.73/108,914.58 = 64,780.53/x
  3. Step 3: Cross multiply
    72,653.73x = 108,914.58 × 64,780.53
  4. Step 4: Simplify right side
    72,653.73x = 7,055,544,217.13
  5. Step 5: Solve for x
    x = 7,055,544,217.13/72,653.73
  6. Step 6: Final answer
    x = 97,111.93

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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.