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Finding the Fourth Proportional to 136,871.55, 205,241.72 and 70,277.40

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Solution

The fourth proportional to 136,871.55, 205,241.72 and 70,277.40 is: 105,382.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,871.55 : 205,241.72 = 70,277.40 : x
  2. Step 2: Convert to fraction form
    136,871.55/205,241.72 = 70,277.40/x
  3. Step 3: Cross multiply
    136,871.55x = 205,241.72 × 70,277.40
  4. Step 4: Simplify right side
    136,871.55x = 14,423,854,101.74
  5. Step 5: Solve for x
    x = 14,423,854,101.74/136,871.55
  6. Step 6: Final answer
    x = 105,382.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.