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Finding the Fourth Proportional to 85,985.30, 129,027.15 and 33,387.95

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Solution

The fourth proportional to 85,985.30, 129,027.15 and 33,387.95 is: 50,101.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,985.30 : 129,027.15 = 33,387.95 : x
  2. Step 2: Convert to fraction form
    85,985.30/129,027.15 = 33,387.95/x
  3. Step 3: Cross multiply
    85,985.30x = 129,027.15 × 33,387.95
  4. Step 4: Simplify right side
    85,985.30x = 4,307,951,387.71
  5. Step 5: Solve for x
    x = 4,307,951,387.71/85,985.30
  6. Step 6: Final answer
    x = 50,101.02

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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.