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Finding the Fourth Proportional to 125,639.70, 188,459.55 and 55,655.70

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Solution

The fourth proportional to 125,639.70, 188,459.55 and 55,655.70 is: 83,483.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,639.70 : 188,459.55 = 55,655.70 : x
  2. Step 2: Convert to fraction form
    125,639.70/188,459.55 = 55,655.70/x
  3. Step 3: Cross multiply
    125,639.70x = 188,459.55 × 55,655.70
  4. Step 4: Simplify right side
    125,639.70x = 10,488,848,176.94
  5. Step 5: Solve for x
    x = 10,488,848,176.94/125,639.70
  6. Step 6: Final answer
    x = 83,483.55

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1.5x scale

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.