Home / 156,109.07-215,284.30-103,628.23

Finding the Fourth Proportional to 156,109.07, 215,284.30 and 103,628.23

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Solution

The fourth proportional to 156,109.07, 215,284.30 and 103,628.23 is: 142,909.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,109.07 : 215,284.30 = 103,628.23 : x
  2. Step 2: Convert to fraction form
    156,109.07/215,284.30 = 103,628.23/x
  3. Step 3: Cross multiply
    156,109.07x = 215,284.30 × 103,628.23
  4. Step 4: Simplify right side
    156,109.07x = 22,309,530,158.51
  5. Step 5: Solve for x
    x = 22,309,530,158.51/156,109.07
  6. Step 6: Final answer
    x = 142,909.89

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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.