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Finding the Fourth Proportional to 125,393.50, 188,090.25 and 42,287.50

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Solution

The fourth proportional to 125,393.50, 188,090.25 and 42,287.50 is: 63,431.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,393.50 : 188,090.25 = 42,287.50 : x
  2. Step 2: Convert to fraction form
    125,393.50/188,090.25 = 42,287.50/x
  3. Step 3: Cross multiply
    125,393.50x = 188,090.25 × 42,287.50
  4. Step 4: Simplify right side
    125,393.50x = 7,953,866,446.88
  5. Step 5: Solve for x
    x = 7,953,866,446.88/125,393.50
  6. Step 6: Final answer
    x = 63,431.25

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1.5x scale

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.