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Finding the Fourth Proportional to 208,641.28, 312,883.35 and 75,488.62

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Solution

The fourth proportional to 208,641.28, 312,883.35 and 75,488.62 is: 113,204.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,641.28 : 312,883.35 = 75,488.62 : x
  2. Step 2: Convert to fraction form
    208,641.28/312,883.35 = 75,488.62/x
  3. Step 3: Cross multiply
    208,641.28x = 312,883.35 × 75,488.62
  4. Step 4: Simplify right side
    208,641.28x = 23,619,132,312.48
  5. Step 5: Solve for x
    x = 23,619,132,312.48/208,641.28
  6. Step 6: Final answer
    x = 113,204.50

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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.