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Finding the Fourth Proportional to 125,612.70, 188,200.35 and 81,216.60

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Solution

The fourth proportional to 125,612.70, 188,200.35 and 81,216.60 is: 121,683.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,612.70 : 188,200.35 = 81,216.60 : x
  2. Step 2: Convert to fraction form
    125,612.70/188,200.35 = 81,216.60/x
  3. Step 3: Cross multiply
    125,612.70x = 188,200.35 × 81,216.60
  4. Step 4: Simplify right side
    125,612.70x = 15,284,992,545.81
  5. Step 5: Solve for x
    x = 15,284,992,545.81/125,612.70
  6. Step 6: Final answer
    x = 121,683.50

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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.