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Finding the Fourth Proportional to 85,518.95, 128,224.09 and 75,010.07

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Solution

The fourth proportional to 85,518.95, 128,224.09 and 75,010.07 is: 112,467.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,518.95 : 128,224.09 = 75,010.07 : x
  2. Step 2: Convert to fraction form
    85,518.95/128,224.09 = 75,010.07/x
  3. Step 3: Cross multiply
    85,518.95x = 128,224.09 × 75,010.07
  4. Step 4: Simplify right side
    85,518.95x = 9,618,098,287.15
  5. Step 5: Solve for x
    x = 9,618,098,287.15/85,518.95
  6. Step 6: Final answer
    x = 112,467.45

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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.