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Finding the Fourth Proportional to 85,575.54, 128,366.94 and 26,409.90

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Solution

The fourth proportional to 85,575.54, 128,366.94 and 26,409.90 is: 39,615.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,575.54 : 128,366.94 = 26,409.90 : x
  2. Step 2: Convert to fraction form
    85,575.54/128,366.94 = 26,409.90/x
  3. Step 3: Cross multiply
    85,575.54x = 128,366.94 × 26,409.90
  4. Step 4: Simplify right side
    85,575.54x = 3,390,158,048.71
  5. Step 5: Solve for x
    x = 3,390,158,048.71/85,575.54
  6. Step 6: Final answer
    x = 39,615.97

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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.