Home / 129,022.47-178,066.76-81,275.00

Finding the Fourth Proportional to 129,022.47, 178,066.76 and 81,275.00

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Solution

The fourth proportional to 129,022.47, 178,066.76 and 81,275.00 is: 112,169.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,022.47 : 178,066.76 = 81,275.00 : x
  2. Step 2: Convert to fraction form
    129,022.47/178,066.76 = 81,275.00/x
  3. Step 3: Cross multiply
    129,022.47x = 178,066.76 × 81,275.00
  4. Step 4: Simplify right side
    129,022.47x = 14,472,374,622.29
  5. Step 5: Solve for x
    x = 14,472,374,622.29/129,022.47
  6. Step 6: Final answer
    x = 112,169.41

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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.