Home / 85,605.28-128,407.56-23,275.60

Finding the Fourth Proportional to 85,605.28, 128,407.56 and 23,275.60

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Solution

The fourth proportional to 85,605.28, 128,407.56 and 23,275.60 is: 34,913.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,605.28 : 128,407.56 = 23,275.60 : x
  2. Step 2: Convert to fraction form
    85,605.28/128,407.56 = 23,275.60/x
  3. Step 3: Cross multiply
    85,605.28x = 128,407.56 × 23,275.60
  4. Step 4: Simplify right side
    85,605.28x = 2,988,763,003.54
  5. Step 5: Solve for x
    x = 2,988,763,003.54/85,605.28
  6. Step 6: Final answer
    x = 34,913.30

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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.