Home / 100,257.14-138,345.66-57,807.47

Finding the Fourth Proportional to 100,257.14, 138,345.66 and 57,807.47

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Solution

The fourth proportional to 100,257.14, 138,345.66 and 57,807.47 is: 79,769.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,257.14 : 138,345.66 = 57,807.47 : x
  2. Step 2: Convert to fraction form
    100,257.14/138,345.66 = 57,807.47/x
  3. Step 3: Cross multiply
    100,257.14x = 138,345.66 × 57,807.47
  4. Step 4: Simplify right side
    100,257.14x = 7,997,412,719.17
  5. Step 5: Solve for x
    x = 7,997,412,719.17/100,257.14
  6. Step 6: Final answer
    x = 79,769.01

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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.