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Finding the Fourth Proportional to 72,925.31, 100,636.93 and 39,391.31

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Solution

The fourth proportional to 72,925.31, 100,636.93 and 39,391.31 is: 54,360.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,925.31 : 100,636.93 = 39,391.31 : x
  2. Step 2: Convert to fraction form
    72,925.31/100,636.93 = 39,391.31/x
  3. Step 3: Cross multiply
    72,925.31x = 100,636.93 × 39,391.31
  4. Step 4: Simplify right side
    72,925.31x = 3,964,220,807.91
  5. Step 5: Solve for x
    x = 3,964,220,807.91/72,925.31
  6. Step 6: Final answer
    x = 54,360.01

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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.