Home / 85,627.80-128,504.79-40,649.31

Finding the Fourth Proportional to 85,627.80, 128,504.79 and 40,649.31

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Solution

The fourth proportional to 85,627.80, 128,504.79 and 40,649.31 is: 61,003.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,627.80 : 128,504.79 = 40,649.31 : x
  2. Step 2: Convert to fraction form
    85,627.80/128,504.79 = 40,649.31/x
  3. Step 3: Cross multiply
    85,627.80x = 128,504.79 × 40,649.31
  4. Step 4: Simplify right side
    85,627.80x = 5,223,630,199.42
  5. Step 5: Solve for x
    x = 5,223,630,199.42/85,627.80
  6. Step 6: Final answer
    x = 61,003.91

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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.