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Finding the Fourth Proportional to 72,950.68, 100,671.78 and 39,416.68

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Solution

The fourth proportional to 72,950.68, 100,671.78 and 39,416.68 is: 54,394.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,950.68 : 100,671.78 = 39,416.68 : x
  2. Step 2: Convert to fraction form
    72,950.68/100,671.78 = 39,416.68/x
  3. Step 3: Cross multiply
    72,950.68x = 100,671.78 × 39,416.68
  4. Step 4: Simplify right side
    72,950.68x = 3,968,147,337.29
  5. Step 5: Solve for x
    x = 3,968,147,337.29/72,950.68
  6. Step 6: Final answer
    x = 54,394.93

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1.5x scale

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.