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Finding the Fourth Proportional to 207,352.80, 285,999.45 and 138,407.49

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Solution

The fourth proportional to 207,352.80, 285,999.45 and 138,407.49 is: 190,903.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,352.80 : 285,999.45 = 138,407.49 : x
  2. Step 2: Convert to fraction form
    207,352.80/285,999.45 = 138,407.49/x
  3. Step 3: Cross multiply
    207,352.80x = 285,999.45 × 138,407.49
  4. Step 4: Simplify right side
    207,352.80x = 39,584,466,015.88
  5. Step 5: Solve for x
    x = 39,584,466,015.88/207,352.80
  6. Step 6: Final answer
    x = 190,903.94

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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.