Home / 85,427.47-128,117.75-25,453.25

Finding the Fourth Proportional to 85,427.47, 128,117.75 and 25,453.25

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Solution

The fourth proportional to 85,427.47, 128,117.75 and 25,453.25 is: 38,172.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,427.47 : 128,117.75 = 25,453.25 : x
  2. Step 2: Convert to fraction form
    85,427.47/128,117.75 = 25,453.25/x
  3. Step 3: Cross multiply
    85,427.47x = 128,117.75 × 25,453.25
  4. Step 4: Simplify right side
    85,427.47x = 3,261,012,832.77
  5. Step 5: Solve for x
    x = 3,261,012,832.77/85,427.47
  6. Step 6: Final answer
    x = 38,172.88

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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.