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Finding the Fourth Proportional to 112,489.40, 168,734.10 and 65,718.20

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Solution

The fourth proportional to 112,489.40, 168,734.10 and 65,718.20 is: 98,577.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,489.40 : 168,734.10 = 65,718.20 : x
  2. Step 2: Convert to fraction form
    112,489.40/168,734.10 = 65,718.20/x
  3. Step 3: Cross multiply
    112,489.40x = 168,734.10 × 65,718.20
  4. Step 4: Simplify right side
    112,489.40x = 11,088,901,330.62
  5. Step 5: Solve for x
    x = 11,088,901,330.62/112,489.40
  6. Step 6: Final answer
    x = 98,577.30

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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.