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Finding the Fourth Proportional to 135,729.81, 187,307.36 and 75,300.45

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Solution

The fourth proportional to 135,729.81, 187,307.36 and 75,300.45 is: 103,914.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,729.81 : 187,307.36 = 75,300.45 : x
  2. Step 2: Convert to fraction form
    135,729.81/187,307.36 = 75,300.45/x
  3. Step 3: Cross multiply
    135,729.81x = 187,307.36 × 75,300.45
  4. Step 4: Simplify right side
    135,729.81x = 14,104,328,119.81
  5. Step 5: Solve for x
    x = 14,104,328,119.81/135,729.81
  6. Step 6: Final answer
    x = 103,914.74

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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.