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Finding the Fourth Proportional to 155,434.59, 214,490.88 and 87,454.49

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Solution

The fourth proportional to 155,434.59, 214,490.88 and 87,454.49 is: 120,682.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,434.59 : 214,490.88 = 87,454.49 : x
  2. Step 2: Convert to fraction form
    155,434.59/214,490.88 = 87,454.49/x
  3. Step 3: Cross multiply
    155,434.59x = 214,490.88 × 87,454.49
  4. Step 4: Simplify right side
    155,434.59x = 18,758,189,447.60
  5. Step 5: Solve for x
    x = 18,758,189,447.60/155,434.59
  6. Step 6: Final answer
    x = 120,682.21

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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.