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Finding the Fourth Proportional to 72,973.02, 100,702.75 and 39,439.02

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Solution

The fourth proportional to 72,973.02, 100,702.75 and 39,439.02 is: 54,425.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,973.02 : 100,702.75 = 39,439.02 : x
  2. Step 2: Convert to fraction form
    72,973.02/100,702.75 = 39,439.02/x
  3. Step 3: Cross multiply
    72,973.02x = 100,702.75 × 39,439.02
  4. Step 4: Simplify right side
    72,973.02x = 3,971,617,771.31
  5. Step 5: Solve for x
    x = 3,971,617,771.31/72,973.02
  6. Step 6: Final answer
    x = 54,425.84

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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.