Home / 156,070.80-215,379-91,578.60

Finding the Fourth Proportional to 156,070.80, 215,379 and 91,578.60

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Solution

The fourth proportional to 156,070.80, 215,379 and 91,578.60 is: 126,379.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,070.80 : 215,379 = 91,578.60 : x
  2. Step 2: Convert to fraction form
    156,070.80/215,379 = 91,578.60/x
  3. Step 3: Cross multiply
    156,070.80x = 215,379 × 91,578.60
  4. Step 4: Simplify right side
    156,070.80x = 19,724,107,289.40
  5. Step 5: Solve for x
    x = 19,724,107,289.40/156,070.80
  6. Step 6: Final answer
    x = 126,379.23

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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.