Home / 151,213.30-208,660.80-87,555.40

Finding the Fourth Proportional to 151,213.30, 208,660.80 and 87,555.40

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Solution

The fourth proportional to 151,213.30, 208,660.80 and 87,555.40 is: 120,818.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,213.30 : 208,660.80 = 87,555.40 : x
  2. Step 2: Convert to fraction form
    151,213.30/208,660.80 = 87,555.40/x
  3. Step 3: Cross multiply
    151,213.30x = 208,660.80 × 87,555.40
  4. Step 4: Simplify right side
    151,213.30x = 18,269,379,808.32
  5. Step 5: Solve for x
    x = 18,269,379,808.32/151,213.30
  6. Step 6: Final answer
    x = 120,818.60

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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.