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Finding the Fourth Proportional to 125,513.60, 188,270.40 and 42,406.40

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Solution

The fourth proportional to 125,513.60, 188,270.40 and 42,406.40 is: 63,609.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,513.60 : 188,270.40 = 42,406.40 : x
  2. Step 2: Convert to fraction form
    125,513.60/188,270.40 = 42,406.40/x
  3. Step 3: Cross multiply
    125,513.60x = 188,270.40 × 42,406.40
  4. Step 4: Simplify right side
    125,513.60x = 7,983,869,890.56
  5. Step 5: Solve for x
    x = 7,983,869,890.56/125,513.60
  6. Step 6: Final answer
    x = 63,609.60

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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.