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Finding the Fourth Proportional to 135,912.80, 187,564.95 and 75,488.05

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Solution

The fourth proportional to 135,912.80, 187,564.95 and 75,488.05 is: 104,176.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,912.80 : 187,564.95 = 75,488.05 : x
  2. Step 2: Convert to fraction form
    135,912.80/187,564.95 = 75,488.05/x
  3. Step 3: Cross multiply
    135,912.80x = 187,564.95 × 75,488.05
  4. Step 4: Simplify right side
    135,912.80x = 14,158,913,075.84
  5. Step 5: Solve for x
    x = 14,158,913,075.84/135,912.80
  6. Step 6: Final answer
    x = 104,176.45

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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.