Home / 85,686.28-128,508.54-25,703.08

Finding the Fourth Proportional to 85,686.28, 128,508.54 and 25,703.08

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Solution

The fourth proportional to 85,686.28, 128,508.54 and 25,703.08 is: 38,548.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,686.28 : 128,508.54 = 25,703.08 : x
  2. Step 2: Convert to fraction form
    85,686.28/128,508.54 = 25,703.08/x
  3. Step 3: Cross multiply
    85,686.28x = 128,508.54 × 25,703.08
  4. Step 4: Simplify right side
    85,686.28x = 3,303,065,284.30
  5. Step 5: Solve for x
    x = 3,303,065,284.30/85,686.28
  6. Step 6: Final answer
    x = 38,548.36

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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.