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Finding the Fourth Proportional to 155,627.70, 214,763.40 and 87,644.40

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Solution

The fourth proportional to 155,627.70, 214,763.40 and 87,644.40 is: 120,947.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,627.70 : 214,763.40 = 87,644.40 : x
  2. Step 2: Convert to fraction form
    155,627.70/214,763.40 = 87,644.40/x
  3. Step 3: Cross multiply
    155,627.70x = 214,763.40 × 87,644.40
  4. Step 4: Simplify right side
    155,627.70x = 18,822,809,334.96
  5. Step 5: Solve for x
    x = 18,822,809,334.96/155,627.70
  6. Step 6: Final answer
    x = 120,947.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.