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Finding the Fourth Proportional to 85,488.96, 128,243.80 and 35,602.88

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Solution

The fourth proportional to 85,488.96, 128,243.80 and 35,602.88 is: 53,408.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,488.96 : 128,243.80 = 35,602.88 : x
  2. Step 2: Convert to fraction form
    85,488.96/128,243.80 = 35,602.88/x
  3. Step 3: Cross multiply
    85,488.96x = 128,243.80 × 35,602.88
  4. Step 4: Simplify right side
    85,488.96x = 4,565,848,622.14
  5. Step 5: Solve for x
    x = 4,565,848,622.14/85,488.96
  6. Step 6: Final answer
    x = 53,408.63

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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.