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Finding the Fourth Proportional to 109,307.40, 163,961.10 and 39,193.80

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Solution

The fourth proportional to 109,307.40, 163,961.10 and 39,193.80 is: 58,790.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,307.40 : 163,961.10 = 39,193.80 : x
  2. Step 2: Convert to fraction form
    109,307.40/163,961.10 = 39,193.80/x
  3. Step 3: Cross multiply
    109,307.40x = 163,961.10 × 39,193.80
  4. Step 4: Simplify right side
    109,307.40x = 6,426,258,561.18
  5. Step 5: Solve for x
    x = 6,426,258,561.18/109,307.40
  6. Step 6: Final answer
    x = 58,790.70

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Similar ratio
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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.