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Finding the Fourth Proportional to 85,750.51, 128,625.77 and 35,803.42

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Solution

The fourth proportional to 85,750.51, 128,625.77 and 35,803.42 is: 53,705.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,750.51 : 128,625.77 = 35,803.42 : x
  2. Step 2: Convert to fraction form
    85,750.51/128,625.77 = 35,803.42/x
  3. Step 3: Cross multiply
    85,750.51x = 128,625.77 × 35,803.42
  4. Step 4: Simplify right side
    85,750.51x = 4,605,242,466.13
  5. Step 5: Solve for x
    x = 4,605,242,466.13/85,750.51
  6. Step 6: Final answer
    x = 53,705.13

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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.