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Finding the Fourth Proportional to 112,771.40, 168,689.62 and 85,914.19

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Solution

The fourth proportional to 112,771.40, 168,689.62 and 85,914.19 is: 128,515.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,771.40 : 168,689.62 = 85,914.19 : x
  2. Step 2: Convert to fraction form
    112,771.40/168,689.62 = 85,914.19/x
  3. Step 3: Cross multiply
    112,771.40x = 168,689.62 × 85,914.19
  4. Step 4: Simplify right side
    112,771.40x = 14,492,832,063.71
  5. Step 5: Solve for x
    x = 14,492,832,063.71/112,771.40
  6. Step 6: Final answer
    x = 128,515.14

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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.