Home / 125,746.20-188,400.60-103,438.80

Finding the Fourth Proportional to 125,746.20, 188,400.60 and 103,438.80

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Solution

The fourth proportional to 125,746.20, 188,400.60 and 103,438.80 is: 154,978.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,746.20 : 188,400.60 = 103,438.80 : x
  2. Step 2: Convert to fraction form
    125,746.20/188,400.60 = 103,438.80/x
  3. Step 3: Cross multiply
    125,746.20x = 188,400.60 × 103,438.80
  4. Step 4: Simplify right side
    125,746.20x = 19,487,931,983.28
  5. Step 5: Solve for x
    x = 19,487,931,983.28/125,746.20
  6. Step 6: Final answer
    x = 154,978.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.