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Finding the Fourth Proportional to 72,950.32, 100,671.41 and 39,416.32

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Solution

The fourth proportional to 72,950.32, 100,671.41 and 39,416.32 is: 54,394.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,950.32 : 100,671.41 = 39,416.32 : x
  2. Step 2: Convert to fraction form
    72,950.32/100,671.41 = 39,416.32/x
  3. Step 3: Cross multiply
    72,950.32x = 100,671.41 × 39,416.32
  4. Step 4: Simplify right side
    72,950.32x = 3,968,095,810.97
  5. Step 5: Solve for x
    x = 3,968,095,810.97/72,950.32
  6. Step 6: Final answer
    x = 54,394.50

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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.