Home / 129,449.13-178,547.75-86,406.91

Finding the Fourth Proportional to 129,449.13, 178,547.75 and 86,406.91

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Solution

The fourth proportional to 129,449.13, 178,547.75 and 86,406.91 is: 119,180.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,449.13 : 178,547.75 = 86,406.91 : x
  2. Step 2: Convert to fraction form
    129,449.13/178,547.75 = 86,406.91/x
  3. Step 3: Cross multiply
    129,449.13x = 178,547.75 × 86,406.91
  4. Step 4: Simplify right side
    129,449.13x = 15,427,759,580.97
  5. Step 5: Solve for x
    x = 15,427,759,580.97/129,449.13
  6. Step 6: Final answer
    x = 119,180.10

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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.