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Finding the Fourth Proportional to 109,639.80, 164,459.70 and 39,493.80

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Solution

The fourth proportional to 109,639.80, 164,459.70 and 39,493.80 is: 59,240.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,639.80 : 164,459.70 = 39,493.80 : x
  2. Step 2: Convert to fraction form
    109,639.80/164,459.70 = 39,493.80/x
  3. Step 3: Cross multiply
    109,639.80x = 164,459.70 × 39,493.80
  4. Step 4: Simplify right side
    109,639.80x = 6,495,138,499.86
  5. Step 5: Solve for x
    x = 6,495,138,499.86/109,639.80
  6. Step 6: Final answer
    x = 59,240.70

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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.