Home / 72,212.84-99,656.43-40,381.66

Finding the Fourth Proportional to 72,212.84, 99,656.43 and 40,381.66

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Solution

The fourth proportional to 72,212.84, 99,656.43 and 40,381.66 is: 55,728.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,212.84 : 99,656.43 = 40,381.66 : x
  2. Step 2: Convert to fraction form
    72,212.84/99,656.43 = 40,381.66/x
  3. Step 3: Cross multiply
    72,212.84x = 99,656.43 × 40,381.66
  4. Step 4: Simplify right side
    72,212.84x = 4,024,292,073.07
  5. Step 5: Solve for x
    x = 4,024,292,073.07/72,212.84
  6. Step 6: Final answer
    x = 55,728.21

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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.