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Finding the Fourth Proportional to 72,417.51, 99,936.14 and 40,152.03

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Solution

The fourth proportional to 72,417.51, 99,936.14 and 40,152.03 is: 55,409.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,417.51 : 99,936.14 = 40,152.03 : x
  2. Step 2: Convert to fraction form
    72,417.51/99,936.14 = 40,152.03/x
  3. Step 3: Cross multiply
    72,417.51x = 99,936.14 × 40,152.03
  4. Step 4: Simplify right side
    72,417.51x = 4,012,638,709.84
  5. Step 5: Solve for x
    x = 4,012,638,709.84/72,417.51
  6. Step 6: Final answer
    x = 55,409.79

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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.