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Finding the Fourth Proportional to 109,223.80, 163,835.70 and 81,230.20

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Solution

The fourth proportional to 109,223.80, 163,835.70 and 81,230.20 is: 121,845.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,223.80 : 163,835.70 = 81,230.20 : x
  2. Step 2: Convert to fraction form
    109,223.80/163,835.70 = 81,230.20/x
  3. Step 3: Cross multiply
    109,223.80x = 163,835.70 × 81,230.20
  4. Step 4: Simplify right side
    109,223.80x = 13,308,406,678.14
  5. Step 5: Solve for x
    x = 13,308,406,678.14/109,223.80
  6. Step 6: Final answer
    x = 121,845.30

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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.