Home / 85,520.75-128,281.13-26,356.43

Finding the Fourth Proportional to 85,520.75, 128,281.13 and 26,356.43

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Solution

The fourth proportional to 85,520.75, 128,281.13 and 26,356.43 is: 39,534.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,520.75 : 128,281.13 = 26,356.43 : x
  2. Step 2: Convert to fraction form
    85,520.75/128,281.13 = 26,356.43/x
  3. Step 3: Cross multiply
    85,520.75x = 128,281.13 × 26,356.43
  4. Step 4: Simplify right side
    85,520.75x = 3,381,032,623.17
  5. Step 5: Solve for x
    x = 3,381,032,623.17/85,520.75
  6. Step 6: Final answer
    x = 39,534.65

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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.