Home / 129,638.13-178,837.04-86,628.18

Finding the Fourth Proportional to 129,638.13, 178,837.04 and 86,628.18

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Solution

The fourth proportional to 129,638.13, 178,837.04 and 86,628.18 is: 119,504.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,638.13 : 178,837.04 = 86,628.18 : x
  2. Step 2: Convert to fraction form
    129,638.13/178,837.04 = 86,628.18/x
  3. Step 3: Cross multiply
    129,638.13x = 178,837.04 × 86,628.18
  4. Step 4: Simplify right side
    129,638.13x = 15,492,327,691.71
  5. Step 5: Solve for x
    x = 15,492,327,691.71/129,638.13
  6. Step 6: Final answer
    x = 119,504.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.