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Finding the Fourth Proportional to 109,207.80, 163,817.10 and 56,719.80

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Solution

The fourth proportional to 109,207.80, 163,817.10 and 56,719.80 is: 85,082.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,207.80 : 163,817.10 = 56,719.80 : x
  2. Step 2: Convert to fraction form
    109,207.80/163,817.10 = 56,719.80/x
  3. Step 3: Cross multiply
    109,207.80x = 163,817.10 × 56,719.80
  4. Step 4: Simplify right side
    109,207.80x = 9,291,673,148.58
  5. Step 5: Solve for x
    x = 9,291,673,148.58/109,207.80
  6. Step 6: Final answer
    x = 85,082.50

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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.