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Finding the Fourth Proportional to 109,435.80, 164,153.70 and 56,947.80

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Solution

The fourth proportional to 109,435.80, 164,153.70 and 56,947.80 is: 85,421.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,435.80 : 164,153.70 = 56,947.80 : x
  2. Step 2: Convert to fraction form
    109,435.80/164,153.70 = 56,947.80/x
  3. Step 3: Cross multiply
    109,435.80x = 164,153.70 × 56,947.80
  4. Step 4: Simplify right side
    109,435.80x = 9,348,192,076.86
  5. Step 5: Solve for x
    x = 9,348,192,076.86/109,435.80
  6. Step 6: Final answer
    x = 85,421.70

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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.