Home / 129,690.14-178,988.40-75,995.64

Finding the Fourth Proportional to 129,690.14, 178,988.40 and 75,995.64

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Solution

The fourth proportional to 129,690.14, 178,988.40 and 75,995.64 is: 104,883.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,690.14 : 178,988.40 = 75,995.64 : x
  2. Step 2: Convert to fraction form
    129,690.14/178,988.40 = 75,995.64/x
  3. Step 3: Cross multiply
    129,690.14x = 178,988.40 × 75,995.64
  4. Step 4: Simplify right side
    129,690.14x = 13,602,338,010.58
  5. Step 5: Solve for x
    x = 13,602,338,010.58/129,690.14
  6. Step 6: Final answer
    x = 104,883.37

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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.