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Finding the Fourth Proportional to 85,775.79, 128,598.77 and 38,333.39

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Solution

The fourth proportional to 85,775.79, 128,598.77 and 38,333.39 is: 57,471.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,775.79 : 128,598.77 = 38,333.39 : x
  2. Step 2: Convert to fraction form
    85,775.79/128,598.77 = 38,333.39/x
  3. Step 3: Cross multiply
    85,775.79x = 128,598.77 × 38,333.39
  4. Step 4: Simplify right side
    85,775.79x = 4,929,625,969.27
  5. Step 5: Solve for x
    x = 4,929,625,969.27/85,775.79
  6. Step 6: Final answer
    x = 57,471.06

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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.