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Finding the Fourth Proportional to 105,462.76, 145,361.10 and 79,960.72

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Solution

The fourth proportional to 105,462.76, 145,361.10 and 79,960.72 is: 110,211.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,462.76 : 145,361.10 = 79,960.72 : x
  2. Step 2: Convert to fraction form
    105,462.76/145,361.10 = 79,960.72/x
  3. Step 3: Cross multiply
    105,462.76x = 145,361.10 × 79,960.72
  4. Step 4: Simplify right side
    105,462.76x = 11,623,178,215.99
  5. Step 5: Solve for x
    x = 11,623,178,215.99/105,462.76
  6. Step 6: Final answer
    x = 110,211.21

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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.