Home / 129,681.13-178,959.81-70,065.13

Finding the Fourth Proportional to 129,681.13, 178,959.81 and 70,065.13

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Solution

The fourth proportional to 129,681.13, 178,959.81 and 70,065.13 is: 96,689.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,681.13 : 178,959.81 = 70,065.13 : x
  2. Step 2: Convert to fraction form
    129,681.13/178,959.81 = 70,065.13/x
  3. Step 3: Cross multiply
    129,681.13x = 178,959.81 × 70,065.13
  4. Step 4: Simplify right side
    129,681.13x = 12,538,842,352.43
  5. Step 5: Solve for x
    x = 12,538,842,352.43/129,681.13
  6. Step 6: Final answer
    x = 96,689.80

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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.