Home / 100,123.14-138,162.06-57,685.08

Finding the Fourth Proportional to 100,123.14, 138,162.06 and 57,685.08

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Solution

The fourth proportional to 100,123.14, 138,162.06 and 57,685.08 is: 79,600.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,123.14 : 138,162.06 = 57,685.08 : x
  2. Step 2: Convert to fraction form
    100,123.14/138,162.06 = 57,685.08/x
  3. Step 3: Cross multiply
    100,123.14x = 138,162.06 × 57,685.08
  4. Step 4: Simplify right side
    100,123.14x = 7,969,889,484.06
  5. Step 5: Solve for x
    x = 7,969,889,484.06/100,123.14
  6. Step 6: Final answer
    x = 79,600.87

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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.