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Finding the Fourth Proportional to 85,257.98, 117,656.80 and 51,267.50

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Solution

The fourth proportional to 85,257.98, 117,656.80 and 51,267.50 is: 70,749.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,257.98 : 117,656.80 = 51,267.50 : x
  2. Step 2: Convert to fraction form
    85,257.98/117,656.80 = 51,267.50/x
  3. Step 3: Cross multiply
    85,257.98x = 117,656.80 × 51,267.50
  4. Step 4: Simplify right side
    85,257.98x = 6,031,969,994
  5. Step 5: Solve for x
    x = 6,031,969,994/85,257.98
  6. Step 6: Final answer
    x = 70,749.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.