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Finding the Fourth Proportional to 171,040.10, 256,705.95 and 76,415.90

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Solution

The fourth proportional to 171,040.10, 256,705.95 and 76,415.90 is: 114,688.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,040.10 : 256,705.95 = 76,415.90 : x
  2. Step 2: Convert to fraction form
    171,040.10/256,705.95 = 76,415.90/x
  3. Step 3: Cross multiply
    171,040.10x = 256,705.95 × 76,415.90
  4. Step 4: Simplify right side
    171,040.10x = 19,616,416,204.61
  5. Step 5: Solve for x
    x = 19,616,416,204.61/171,040.10
  6. Step 6: Final answer
    x = 114,688.99

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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.