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Finding the Fourth Proportional to 85,832.73, 128,398.91 and 69,211.53

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Solution

The fourth proportional to 85,832.73, 128,398.91 and 69,211.53 is: 103,534.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,832.73 : 128,398.91 = 69,211.53 : x
  2. Step 2: Convert to fraction form
    85,832.73/128,398.91 = 69,211.53/x
  3. Step 3: Cross multiply
    85,832.73x = 128,398.91 × 69,211.53
  4. Step 4: Simplify right side
    85,832.73x = 8,886,684,665.37
  5. Step 5: Solve for x
    x = 8,886,684,665.37/85,832.73
  6. Step 6: Final answer
    x = 103,534.92

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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.