Home / 123,533.38-170,386.05-78,218.74

Finding the Fourth Proportional to 123,533.38, 170,386.05 and 78,218.74

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Solution

The fourth proportional to 123,533.38, 170,386.05 and 78,218.74 is: 107,884.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,533.38 : 170,386.05 = 78,218.74 : x
  2. Step 2: Convert to fraction form
    123,533.38/170,386.05 = 78,218.74/x
  3. Step 3: Cross multiply
    123,533.38x = 170,386.05 × 78,218.74
  4. Step 4: Simplify right side
    123,533.38x = 13,327,382,144.58
  5. Step 5: Solve for x
    x = 13,327,382,144.58/123,533.38
  6. Step 6: Final answer
    x = 107,884.87

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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.