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Finding the Fourth Proportional to 109,728.60, 164,592.90 and 72,330.90

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Solution

The fourth proportional to 109,728.60, 164,592.90 and 72,330.90 is: 108,496.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,728.60 : 164,592.90 = 72,330.90 : x
  2. Step 2: Convert to fraction form
    109,728.60/164,592.90 = 72,330.90/x
  3. Step 3: Cross multiply
    109,728.60x = 164,592.90 × 72,330.90
  4. Step 4: Simplify right side
    109,728.60x = 11,905,152,590.61
  5. Step 5: Solve for x
    x = 11,905,152,590.61/109,728.60
  6. Step 6: Final answer
    x = 108,496.35

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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.