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Finding the Fourth Proportional to 72,608.67, 108,371.32 and 70,836.93

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Solution

The fourth proportional to 72,608.67, 108,371.32 and 70,836.93 is: 105,726.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,608.67 : 108,371.32 = 70,836.93 : x
  2. Step 2: Convert to fraction form
    72,608.67/108,371.32 = 70,836.93/x
  3. Step 3: Cross multiply
    72,608.67x = 108,371.32 × 70,836.93
  4. Step 4: Simplify right side
    72,608.67x = 7,676,691,431.76
  5. Step 5: Solve for x
    x = 7,676,691,431.76/72,608.67
  6. Step 6: Final answer
    x = 105,726.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.