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Finding the Fourth Proportional to 112,375.40, 168,368.70 and 72,912.20

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Solution

The fourth proportional to 112,375.40, 168,368.70 and 72,912.20 is: 109,242.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,375.40 : 168,368.70 = 72,912.20 : x
  2. Step 2: Convert to fraction form
    112,375.40/168,368.70 = 72,912.20/x
  3. Step 3: Cross multiply
    112,375.40x = 168,368.70 × 72,912.20
  4. Step 4: Simplify right side
    112,375.40x = 12,276,132,328.14
  5. Step 5: Solve for x
    x = 12,276,132,328.14/112,375.40
  6. Step 6: Final answer
    x = 109,242.17

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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.