Home / 85,615.64-128,435.72-26,456.36

Finding the Fourth Proportional to 85,615.64, 128,435.72 and 26,456.36

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Solution

The fourth proportional to 85,615.64, 128,435.72 and 26,456.36 is: 39,688.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,615.64 : 128,435.72 = 26,456.36 : x
  2. Step 2: Convert to fraction form
    85,615.64/128,435.72 = 26,456.36/x
  3. Step 3: Cross multiply
    85,615.64x = 128,435.72 × 26,456.36
  4. Step 4: Simplify right side
    85,615.64x = 3,397,941,645.18
  5. Step 5: Solve for x
    x = 3,397,941,645.18/85,615.64
  6. Step 6: Final answer
    x = 39,688.33

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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.