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Finding the Fourth Proportional to 72,374.99, 99,877.46 and 39,669.21

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Solution

The fourth proportional to 72,374.99, 99,877.46 and 39,669.21 is: 54,743.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,374.99 : 99,877.46 = 39,669.21 : x
  2. Step 2: Convert to fraction form
    72,374.99/99,877.46 = 39,669.21/x
  3. Step 3: Cross multiply
    72,374.99x = 99,877.46 × 39,669.21
  4. Step 4: Simplify right side
    72,374.99x = 3,962,059,935.01
  5. Step 5: Solve for x
    x = 3,962,059,935.01/72,374.99
  6. Step 6: Final answer
    x = 54,743.50

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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.