Home / 85,799.36-128,743.08-40,871.60

Finding the Fourth Proportional to 85,799.36, 128,743.08 and 40,871.60

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Solution

The fourth proportional to 85,799.36, 128,743.08 and 40,871.60 is: 61,328.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,799.36 : 128,743.08 = 40,871.60 : x
  2. Step 2: Convert to fraction form
    85,799.36/128,743.08 = 40,871.60/x
  3. Step 3: Cross multiply
    85,799.36x = 128,743.08 × 40,871.60
  4. Step 4: Simplify right side
    85,799.36x = 5,261,935,668.53
  5. Step 5: Solve for x
    x = 5,261,935,668.53/85,799.36
  6. Step 6: Final answer
    x = 61,328.38

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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.