Home / 156,860.75-216,358.39-103,128.59

Finding the Fourth Proportional to 156,860.75, 216,358.39 and 103,128.59

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Solution

The fourth proportional to 156,860.75, 216,358.39 and 103,128.59 is: 142,245.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,860.75 : 216,358.39 = 103,128.59 : x
  2. Step 2: Convert to fraction form
    156,860.75/216,358.39 = 103,128.59/x
  3. Step 3: Cross multiply
    156,860.75x = 216,358.39 × 103,128.59
  4. Step 4: Simplify right side
    156,860.75x = 22,312,736,365.18
  5. Step 5: Solve for x
    x = 22,312,736,365.18/156,860.75
  6. Step 6: Final answer
    x = 142,245.50

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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.