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Finding the Fourth Proportional to 85,278.96, 117,543.96 and 56,974.32

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Solution

The fourth proportional to 85,278.96, 117,543.96 and 56,974.32 is: 78,530.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,278.96 : 117,543.96 = 56,974.32 : x
  2. Step 2: Convert to fraction form
    85,278.96/117,543.96 = 56,974.32/x
  3. Step 3: Cross multiply
    85,278.96x = 117,543.96 × 56,974.32
  4. Step 4: Simplify right side
    85,278.96x = 6,696,987,191.11
  5. Step 5: Solve for x
    x = 6,696,987,191.11/85,278.96
  6. Step 6: Final answer
    x = 78,530.36

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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.