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Finding the Fourth Proportional to 72,973.32, 100,703.16 and 39,439.32

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Solution

The fourth proportional to 72,973.32, 100,703.16 and 39,439.32 is: 54,426.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,973.32 : 100,703.16 = 39,439.32 : x
  2. Step 2: Convert to fraction form
    72,973.32/100,703.16 = 39,439.32/x
  3. Step 3: Cross multiply
    72,973.32x = 100,703.16 × 39,439.32
  4. Step 4: Simplify right side
    72,973.32x = 3,971,664,152.25
  5. Step 5: Solve for x
    x = 3,971,664,152.25/72,973.32
  6. Step 6: Final answer
    x = 54,426.25

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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.