Home / 103,388.78-142,730.70-69,575.06

Finding the Fourth Proportional to 103,388.78, 142,730.70 and 69,575.06

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Solution

The fourth proportional to 103,388.78, 142,730.70 and 69,575.06 is: 96,050.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,388.78 : 142,730.70 = 69,575.06 : x
  2. Step 2: Convert to fraction form
    103,388.78/142,730.70 = 69,575.06/x
  3. Step 3: Cross multiply
    103,388.78x = 142,730.70 × 69,575.06
  4. Step 4: Simplify right side
    103,388.78x = 9,930,497,016.34
  5. Step 5: Solve for x
    x = 9,930,497,016.34/103,388.78
  6. Step 6: Final answer
    x = 96,050.05

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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.