Home / 85,839.20-128,467.20-75,341.60

Finding the Fourth Proportional to 85,839.20, 128,467.20 and 75,341.60

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Solution

The fourth proportional to 85,839.20, 128,467.20 and 75,341.60 is: 112,756.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,839.20 : 128,467.20 = 75,341.60 : x
  2. Step 2: Convert to fraction form
    85,839.20/128,467.20 = 75,341.60/x
  3. Step 3: Cross multiply
    85,839.20x = 128,467.20 × 75,341.60
  4. Step 4: Simplify right side
    85,839.20x = 9,678,924,395.52
  5. Step 5: Solve for x
    x = 9,678,924,395.52/85,839.20
  6. Step 6: Final answer
    x = 112,756.46

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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.