Home / 85,616.40-128,438.32-26,438.16

Finding the Fourth Proportional to 85,616.40, 128,438.32 and 26,438.16

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Solution

The fourth proportional to 85,616.40, 128,438.32 and 26,438.16 is: 39,661.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,616.40 : 128,438.32 = 26,438.16 : x
  2. Step 2: Convert to fraction form
    85,616.40/128,438.32 = 26,438.16/x
  3. Step 3: Cross multiply
    85,616.40x = 128,438.32 × 26,438.16
  4. Step 4: Simplify right side
    85,616.40x = 3,395,672,854.29
  5. Step 5: Solve for x
    x = 3,395,672,854.29/85,616.40
  6. Step 6: Final answer
    x = 39,661.48

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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.